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code/game/objects/items/grenades/plastic.dm

@@ -47,7 +47,7 @@
 		playsound(src, 'sound/weapons/tap.ogg', 20, 1)
 		update_icon()
 		return
-	if(nadeassembly && istype(I, /obj/item/wirecutters))
+	if(nadeassembly && I.tool_behaviour == TOOL_WIRECUTTER)
 		I.play_tool_sound(src, 20)
 		nadeassembly.forceMove(get_turf(src))
 		nadeassembly.master = null
@@ -206,7 +206,7 @@
 	user.gib(1, 1)
 
 /obj/item/grenade/plastic/c4/attackby(obj/item/I, mob/user, params)
-	if(istype(I, /obj/item/screwdriver))
+	if(I.tool_behaviour == TOOL_SCREWDRIVER)
 		open_panel = !open_panel
 		to_chat(user, "<span class='notice'>You [open_panel ? "open" : "close"] the wire panel.</span>")
 	else if(is_wire_tool(I))