diff --git a/assets/mods/basegame/items/items.tga b/assets/mods/basegame/items/items.tga
index 0f988088e..3a4eeb0ec 100644
--- a/assets/mods/basegame/items/items.tga
+++ b/assets/mods/basegame/items/items.tga
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:c87d1561269a2de48040d883fe8903afd72f751b89377dd77c59023914e315a5
+oid sha256:09a7e7864ea77f9793ff71601f9e727cbfcc55ffcf921ca74d9b800edb3a8613
 size 2408466
diff --git a/assets/mods/basegame/wires/256.tga b/assets/mods/basegame/wires/256.tga
new file mode 100644
index 000000000..f45420d35
--- /dev/null
+++ b/assets/mods/basegame/wires/256.tga
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:59130811ec5bf60eb1820da7afd85b28a25536c881a9a4d827ad1c7cd9361486
+size 32786
diff --git a/assets/mods/basegame/wires/wires.csv b/assets/mods/basegame/wires/wires.csv
index 804e4167d..7f2e493e9 100644
--- a/assets/mods/basegame/wires/wires.csv
+++ b/assets/mods/basegame/wires/wires.csv
@@ -9,6 +9,7 @@ id;drop;name;renderclass;accept;inputcount;inputtype;outputtype;javaclass;invent
 2;2;WIRE_POWER_HIGH;power;power_high;3;N/A;N/A;net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire;basegame.items,6,4;1;"POWERWIRE_HIGH"
 16;16;WIRE_ETHERNET;network;10base2;3;N/A;N/A;net.torvald.terrarum.modulebasegame.gameitems.WirePieceSignalWire;basegame.items,7,4;1;"ETHERNETWIRE"
 
+256;256;AXLE;axle;axle;1;N/A;N/A;net.torvald.terrarum.modulebasegame.gameitems.WirePieceAxle;basegame.items,1,5;0;"AXLE"
 
 # accept: which wiretype (defined elsewhere) the wires acceps. Use comma to separate multiple. N/A for electronic components (aka not wires)
 # inputcount: how many sides are input (outputcount is deduced from the inputcount). N/A for wires
diff --git a/src/net/torvald/terrarum/gameworld/GameWorld.kt b/src/net/torvald/terrarum/gameworld/GameWorld.kt
index 9bb0900ef..96e84657a 100644
--- a/src/net/torvald/terrarum/gameworld/GameWorld.kt
+++ b/src/net/torvald/terrarum/gameworld/GameWorld.kt
@@ -120,8 +120,8 @@ open class GameWorld(
      * Single block can have multiple conduits, different types of conduits are stored separately.
      */
     public val wirings = HashedWirings()
-
     private val wiringGraph = HashedWiringGraph()
+
     @Transient private val WIRE_POS_MAP = intArrayOf(1,2,4,8)
     @Transient private val WIRE_ANTIPOS_MAP = intArrayOf(4,8,1,2)
 
diff --git a/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalSwitchManual.kt b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalSwitchManual.kt
index 4767c600d..9e805b6d4 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalSwitchManual.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameactors/FixtureLogicSignalSwitchManual.kt
@@ -144,7 +144,7 @@ class FixtureLogicSignalPressurePlate : Electric {
     )
 
     @Transient open val minMass = 2.0 // different types of switches can have different minimal mass?
-    @Transient open val holdTime = 30 // ticks
+    @Transient open val holdTime = 30 // ingame TIME_T
 
 
     private var triggeredTime: Long? = null // null = off; number: TIME_T that the button was held down
diff --git a/src/net/torvald/terrarum/modulebasegame/gameitems/BlockBase.kt b/src/net/torvald/terrarum/modulebasegame/gameitems/BlockBase.kt
index fb813475c..a106ddf0d 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameitems/BlockBase.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameitems/BlockBase.kt
@@ -2,6 +2,7 @@ package net.torvald.terrarum.modulebasegame.gameitems
 
 import com.badlogic.gdx.Gdx
 import net.torvald.terrarum.*
+import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZE
 import net.torvald.terrarum.gameactors.ActorWithBody
 import net.torvald.terrarum.gameitems.GameItem
 import net.torvald.terrarum.gameitems.ItemID
@@ -80,10 +81,18 @@ object BlockBase {
     }
 
     private val wireVectorChars = arrayOf(
-            "· · · ·","· · · →","· · ↓ ·","· · ↓ →","· ← · ·","· ← · →","· ← ↓ ·","· ← ↓ →","↑ · · ·","↑ · · →","↑ · ↓ ·","↑ · ↓ →","↑ ← · ·","↑ ← · →","↑ ← ↓ ·","↑ ← ↓ →",
+        "· · · ·","· · · →","· · ↓ ·","· · ↓ →",
+        "· ← · ·","· ← · →","· ← ↓ ·","· ← ↓ →",
+        "↑ · · ·","↑ · · →","↑ · ↓ ·","↑ · ↓ →",
+        "↑ ← · ·","↑ ← · →","↑ ← ↓ ·","↑ ← ↓ →",
     )
     fun Int.toWireVectorBitsStr(): String = "[${wireVectorChars[this]}]($this)"
-    fun Int.wireNodeMirror() = this.shl(4).or(this).ushr(2).and(15)
+    private val wireMirrorLUT = arrayOf(0,4,8,12,1,5,9,13,2,6,10,14,3,7,11,15)
+//    fun Int.wireNodeMirror() = this.shl(4).or(this).ushr(2).and(15)
+    fun Int.wireNodeMirror() = wireMirrorLUT[this]
+    private val wireExtendLUT = arrayOf(0,5,10,15,5,5,15,15,10,15,10,15,15,15,15,15)
+    fun Int.wireNodeExtend() = wireExtendLUT[this]
+    fun Int.isOrthogonalTo(other: Int) = (this.wireNodeExtend() and other.wireNodeExtend() == 0)
     fun wireNodesConnectedEachOther(oldToNewVector: Int, new: Int?, old: Int?): Boolean {
         return if (new == null || old == null || oldToNewVector == 0) false
         else {
@@ -93,7 +102,7 @@ object BlockBase {
             val q = newToOldVector and new
             if (p == 0 && q == 0) false
             else if (p > 0 && q > 0) true
-            else throw IllegalStateException("oldToNewVector = ${oldToNewVector.toWireVectorBitsStr()}, new = ${new.toWireVectorBitsStr()}, old = ${old.toWireVectorBitsStr()}")
+            else throw IllegalStateException("oldToNewVector = ${oldToNewVector.toWireVectorBitsStr()}, newToOldVector = ${newToOldVector.toWireVectorBitsStr()}; old = ${old.toWireVectorBitsStr()}, new = ${new.toWireVectorBitsStr()}")
         }
     }
 
@@ -103,16 +112,25 @@ object BlockBase {
     private var oldTileX = -1
     private var oldTileY = -1
 
-    private fun placeWirePieceTo(world: GameWorld, item: ItemID, x: Int, y: Int) {
-        world.setTileWire(x, y, item, false, 0)
+    private fun placeWirePieceTo(world: GameWorld, item: ItemID, x: Int, y: Int, cnx: Int = 0) {
+        world.setTileWire(x, y, item, false, cnx)
     }
 
     /**
      * This function assumes xy and oxy are neighboured and tiles are correctly placed
      */
-    private fun setConnectivity(world: GameWorld, vec: Int, item: ItemID, x: Int, y: Int, ox: Int, oy: Int) {
-        world.getWireGraphOf(x, y, item)!!.let { world.setWireGraphOf(x, y, item, vec.wireNodeMirror() or it) }
-        world.getWireGraphOf(ox, oy, item)!!.let { world.setWireGraphOf(ox, oy, item, vec or it) }
+    private fun setConnectivity(mode: String, world: GameWorld, vec: Int, item: ItemID, x: Int, y: Int, ox: Int, oy: Int) {
+        when (mode) {
+            "axle" -> {
+                // vec is guaranteed to be 5 or 10
+                world.setWireGraphOf(x, y, item, vec)
+                world.setWireGraphOf(ox, oy, item, vec)
+            }
+            else -> {
+                world.getWireGraphOf(x, y, item)!!.let { world.setWireGraphOf(x, y, item, vec.wireNodeMirror() or it) }
+                world.getWireGraphOf(ox, oy, item)!!.let { world.setWireGraphOf(ox, oy, item, vec or it) }
+            }
+        }
     }
 
     private fun isNeighbouring(ww: Int, x1: Int, y1: Int, x2: Int, y2: Int): Boolean {
@@ -125,7 +143,7 @@ object BlockBase {
           else false
     }
 
-    fun wireStartPrimaryUse(actor: ActorWithBody, gameItem: GameItem, delta: Float) = mouseInInteractableRange(actor) { _, _, mtx, mty ->
+    fun wireStartPrimaryUse(actor: ActorWithBody, gameItem: GameItem, delta: Float, wirePlaceMode: String) = mouseInInteractableRange(actor) { mx, my, mtx, mty ->
 
         val itemID = gameItem.originalID
         val ingame = Terrarum.ingame!! as TerrarumIngame
@@ -147,15 +165,34 @@ object BlockBase {
         val thisTileOccupied = thisTileWires.first?.searchFor(itemID) != null
         val oldTileOccupied = oldTileWires.first?.searchFor(itemID) != null
 
-        val oldToNewVector = if (mtx == ww - 1 && oldTileX == 0) 4
+        val oldToNewVector = when (wirePlaceMode) {
+            "axle" -> {
+                // determine new vector by dividing the block cell in X-shape
+                val mxt = mx - mtx * TILE_SIZE
+                val myt = my - mty * TILE_SIZE
+                // f(y)=myt
+                // g(y)=-myt+TILE_SIZE
+                // check if ( f(y) < x < g(y) OR f(y) > x > g(y) )
+                // or, check if mouse is in the hourglass-shaped 🮚 area
+                if ((myt < mxt && mxt < -myt+TILE_SIZE) || (myt > mxt && mxt > -myt+TILE_SIZE))
+                    10
+                else
+                    5
+            }
+            else -> {
+                if (mtx == ww - 1 && oldTileX == 0) 4
                 else if (mtx == 0 && oldTileX == ww - 1) 1
                 else if (mtx - oldTileX == 1) 1
                 else if (mtx - oldTileX == -1) 4
                 else if (mty - oldTileY == 1) 2
                 else if (mty - oldTileY == -1) 8
                 else 0 // if xy == oxy, the vector will be 0
-
-        val connectedEachOther = wireNodesConnectedEachOther(oldToNewVector, thisTileWireCnx, oldTileWireCnx)
+            }
+        }
+        val connectedEachOther = when (wirePlaceMode) {
+            "axle" -> thisTileOccupied && oldTileOccupied
+            else -> wireNodesConnectedEachOther(oldToNewVector, thisTileWireCnx, oldTileWireCnx)
+        }
         val thisTileWasDraggedOn = initialMouseDownTileX != mtx || initialMouseDownTileY != mty
 
         var ret = -1L
@@ -173,7 +210,7 @@ object BlockBase {
         if (!thisTileWasDraggedOn) {
             if (thisTileOccupied) return@mouseInInteractableRange -1
             else {
-                placeWirePieceTo(ingame.world, itemID, mtx, mty)
+                placeWirePieceTo(ingame.world, itemID, mtx, mty, oldToNewVector)
                 ret = 1
             }
         }
@@ -182,12 +219,12 @@ object BlockBase {
                 ret -1
             }
             else if (thisTileOccupied && oldTileOccupied) {
-                setConnectivity(ingame.world, oldToNewVector, itemID, mtx, mty, oldTileX, oldTileY)
+                setConnectivity(wirePlaceMode, ingame.world, oldToNewVector, itemID, mtx, mty, oldTileX, oldTileY)
                 ret = 0
             }
             else {
                 placeWirePieceTo(ingame.world, itemID, mtx, mty)
-                setConnectivity(ingame.world, oldToNewVector, itemID, mtx, mty, oldTileX, oldTileY)
+                setConnectivity(wirePlaceMode, ingame.world, oldToNewVector, itemID, mtx, mty, oldTileX, oldTileY)
                 ret = 1
             }
         }
diff --git a/src/net/torvald/terrarum/modulebasegame/gameitems/WirePieceSignalWire.kt b/src/net/torvald/terrarum/modulebasegame/gameitems/WirePieceSignalWire.kt
index 252077471..9f641418a 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameitems/WirePieceSignalWire.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameitems/WirePieceSignalWire.kt
@@ -1,13 +1,11 @@
 package net.torvald.terrarum.modulebasegame.gameitems
 
-import com.badlogic.gdx.graphics.g2d.TextureRegion
 import net.torvald.terrarum.CommonResourcePool
 import net.torvald.terrarum.WireCodex
 import net.torvald.terrarum.gameactors.ActorWithBody
 import net.torvald.terrarum.gameitems.FixtureInteractionBlocked
 import net.torvald.terrarum.gameitems.GameItem
 import net.torvald.terrarum.gameitems.ItemID
-import net.torvald.terrarum.itemproperties.Material
 
 /**
  * @param originalID something like `basegame:8192` (the id must exist on wires.csv)
@@ -34,7 +32,44 @@ class WirePieceSignalWire(originalID: ItemID, private val atlasID: String, priva
     }
 
     override fun startPrimaryUse(actor: ActorWithBody, delta: Float): Long {
-        return BlockBase.wireStartPrimaryUse(actor,this, delta)
+        return BlockBase.wireStartPrimaryUse(actor,this, delta, "signal_wire")
+    }
+
+    override fun effectWhileEquipped(actor: ActorWithBody, delta: Float) {
+        BlockBase.wireEffectWhenEquipped(this, delta)
+    }
+
+    override fun effectOnUnequip(actor: ActorWithBody) {
+        BlockBase.wireEffectWhenUnequipped(this)
+    }
+}
+
+/**
+ * @param originalID something like `basegame:8192` (the id must exist on wires.csv)
+ *
+ * Created by minjaesong on 2024-10-02.
+ */
+class WirePieceAxle(originalID: ItemID, private val atlasID: String, private val sheetX: Int, private val sheetY: Int)
+    : GameItem(originalID), FixtureInteractionBlocked {
+
+    override var dynamicID: ItemID = originalID
+    override var baseMass = 0.001
+    override var baseToolSize: Double? = null
+    override var inventoryCategory = Category.WIRE
+    override val canBeDynamic = false
+    override val materialId = ""
+    init {
+        itemImage = CommonResourcePool.getAsItemSheet(atlasID).get(sheetX, sheetY)
+    }
+
+    init {
+        equipPosition = GameItem.EquipPosition.HAND_GRIP
+        originalName = "ITEM_AXLE"
+        tags.addAll(WireCodex[originalID].tags)
+    }
+
+    override fun startPrimaryUse(actor: ActorWithBody, delta: Float): Long {
+        return BlockBase.wireStartPrimaryUse(actor,this, delta, "axle")
     }
 
     override fun effectWhileEquipped(actor: ActorWithBody, delta: Float) {
diff --git a/work_files/graphics/items/basegame_items.kra b/work_files/graphics/items/basegame_items.kra
index 99c8d4c31..c07079bc0 100644
--- a/work_files/graphics/items/basegame_items.kra
+++ b/work_files/graphics/items/basegame_items.kra
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:76339f18f3f1ee355d8639181b785f22415ee68601c2a507284d4e064e4bbede
-size 1790388
+oid sha256:83e00f10dd8a5f3d0b3058edd6cc0b866d1c8bd3c626c05cb7b3d853716dfdaf
+size 1801204
diff --git a/work_files/graphics/sprites/fixtures/axle.kra b/work_files/graphics/sprites/fixtures/axle.kra
new file mode 100644
index 000000000..0a8ed0d60
--- /dev/null
+++ b/work_files/graphics/sprites/fixtures/axle.kra
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:881fa98595598c44ad9c1e3599c6de63bbaefecc7871c15253d095923b44db24
+size 63474