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code/modules/antagonists/bloodsucker/items/bloodsucker_stake.dm

@@ -43,14 +43,13 @@
 	// This exists so Hardened/Silver Stake can't have a welding torch used on them.
 
 /obj/item/stake/basic/attackby(obj/item/W, mob/user, params)
-	if(istype(W, /obj/item/weldingtool))
+	if(W.tool_behaviour == TOOL_WELDER)
 		//if (amWelded)
 		//	to_chat(user, "<span class='warning'>This stake has already been treated with fire.</span>")
 		//	return
 		//amWelded = TRUE
 		// Weld it
-		var/obj/item/weldingtool/WT = W
-		if(WT.use(0))//remove_fuel(0,user))
+		if(W.use(0))//remove_fuel(0,user))
 			user.visible_message("[user.name] scorched the pointy end of [src] with the welding tool.", \
 						 "<span class='notice'>You scorch the pointy end of [src] with the welding tool.</span>", \
 						 "<span class='italics'>You hear welding.</span>")

code/modules/antagonists/bloodsucker/objects/bloodsucker_coffin.dm

@@ -164,11 +164,11 @@
 			if(istype(W, cutting_tool))
 				to_chat(user, "<span class='notice'>This is a much more complex mechanical structure than you thought. You don't know where to begin cutting [src].</span>")
 				return
-		else if(anchored && istype(W, /obj/item/wrench)) // Can't unanchor unless owner.
+		else if(anchored && W.tool_behaviour == TOOL_WRENCH) // Can't unanchor unless owner.
 			to_chat(user, "<span class='danger'>The coffin won't come unanchored from the floor.</span>")
 			return
 
-	if(locked && istype(W, /obj/item/crowbar))
+	if(locked && W.tool_behaviour == TOOL_CROWBAR)
 		var/pry_time = pryLidTimer * W.toolspeed // Pry speed must be affected by the speed of the tool.
 		user.visible_message("<span class='notice'>[user] tries to pry the lid off of [src] with [W].</span>", \
 							  "<span class='notice'>You begin prying the lid off of [src] with [W]. This should take about [DisplayTimeText(pry_time)].</span>")

code/modules/antagonists/clockcult/clock_structure.dm

@@ -95,7 +95,7 @@
 		return ..()
 
 /obj/structure/destructible/clockwork/attackby(obj/item/I, mob/user, params)
-	if(is_servant_of_ratvar(user) && istype(I, /obj/item/wrench) && unanchored_icon)
+	if(is_servant_of_ratvar(user) && I.tool_behaviour == TOOL_WRENCH && unanchored_icon)
 		if(default_unfasten_wrench(user, I, 50) == SUCCESSFUL_UNFASTEN)
 			update_anchored(user)
 		return 1

code/modules/antagonists/clockcult/clock_structures/wall_gear.dm

@@ -23,10 +23,10 @@
 	return
 
 /obj/structure/destructible/clockwork/wall_gear/attackby(obj/item/I, mob/user, params)
-	if(istype(I, /obj/item/wrench))
+	if(I.tool_behaviour == TOOL_WRENCH)
 		default_unfasten_wrench(user, I, 10)
 		return 1
-	else if(istype(I, /obj/item/screwdriver))
+	else if(I.tool_behaviour == TOOL_SCREWDRIVER)
 		if(anchored)
 			to_chat(user, "<span class='warning'>[src] needs to be unsecured to disassemble it!</span>")
 		else

code/modules/antagonists/nukeop/equipment/nuclearbomb.dm

@@ -104,7 +104,7 @@
 
 	switch(deconstruction_state)
 		if(NUKESTATE_INTACT)
-			if(istype(I, /obj/item/screwdriver/nuke))
+			if(istype(I, /obj/item/screwdriver/nuke))	//Special case, cannot replace with tool_behavior
 				to_chat(user, "<span class='notice'>You start removing [src]'s front panel's screws...</span>")
 				if(I.use_tool(src, user, 60, volume=100))
 					deconstruction_state = NUKESTATE_UNSCREWED

code/modules/antagonists/swarmer/swarmer.dm

@@ -43,7 +43,7 @@
 	to_chat(user, "<span class='notice'>Picking up the swarmer may cause it to activate. You should be careful about this.</span>")
 
 /obj/effect/mob_spawn/swarmer/attackby(obj/item/W, mob/user, params)
-	if(istype(W, /obj/item/screwdriver) && user.a_intent != INTENT_HARM)
+	if(W.tool_behaviour == TOOL_SCREWDRIVER && user.a_intent != INTENT_HARM)
 		user.visible_message("<span class='warning'>[usr.name] deactivates [src].</span>",
 			"<span class='notice'>After some fiddling, you find a way to disable [src]'s power source.</span>",
 			"<span class='italics'>You hear clicking.</span>")