diff --git a/code/game/objects/items/weapons/keys.dm b/code/game/objects/items/weapons/keys.dm
new file mode 100644
index 0000000000..fc13449767
--- /dev/null
+++ b/code/game/objects/items/weapons/keys.dm
@@ -0,0 +1,10 @@
+/obj/item/weapon/simple_key
+	name = "key"
+	desc = "A plain, old-timey key, as one might use to unlock a door."
+	icon = 'icons/obj/keys.dmi'
+	icon_state = "key_basetype"
+	drop_sound = 'sound/items/drop/ring.ogg'
+	pickup_sound = 'sound/items/pickup/ring.ogg'
+	w_class = ITEMSIZE_TINY
+	var/keyverb = "uses"				//so simple_keys can be keycards instead, if desired
+	var/key_id = "placeholder_DONOTUSE"	//needs to match the associated door's LOCK_ID var
\ No newline at end of file
diff --git a/code/game/objects/structures/simple_doors.dm b/code/game/objects/structures/simple_doors.dm
index f54abd7439..f032855e3a 100644
--- a/code/game/objects/structures/simple_doors.dm
+++ b/code/game/objects/structures/simple_doors.dm
@@ -16,6 +16,10 @@
 	var/knock_sound = 'sound/machines/door/knock_glass.ogg'
 	var/knock_hammer_sound = 'sound/weapons/sonic_jackhammer.ogg'
 
+	var/locked = FALSE	//has the door been locked?
+	var/lock_id = null	//does the door have an associated key?
+	var/keysound = 'sound/items/toolbelt_equip.ogg'
+
 /obj/structure/simple_door/fire_act(datum/gas_mixture/air, exposed_temperature, exposed_volume)
 	TemperatureAct(exposed_temperature)
 
@@ -97,6 +101,9 @@
 		var/mob/M = user
 		if(!material.can_open_material_door(user))
 			return
+		if(locked && state == 0)
+			to_chat(M,"<span class='warning'>It's locked!</span>")
+			return
 		if(world.time - user.last_bumped <= 60)
 			return
 		if(M.client)
@@ -147,13 +154,24 @@
 
 /obj/structure/simple_door/attackby(obj/item/weapon/W as obj, mob/user as mob)
 	user.setClickCooldown(DEFAULT_ATTACK_COOLDOWN)
-	if(istype(W,/obj/item/weapon/pickaxe))
+	if(istype(W,/obj/item/weapon/simple_key))
+		var/obj/item/weapon/simple_key/key = W
+		if(state)
+			to_chat(user,"<span class='notice'>\The [src] must be closed in order for you to lock it.</span>")
+		else if(key.key_id != src.lock_id)
+			to_chat(user,"<span class='warning'>The [key] doesn't fit \the [src]'s lock!</span>")
+		else if(key.key_id == src.lock_id)
+			visible_message("<span class='notice'>[user] [key.keyverb] \the [key] and [locked ? "unlocks" : "locks"] \the [src].</span>")
+			locked = !locked
+			playsound(src, keysound,100, 1)
+		return
+	if(istype(W,/obj/item/weapon/pickaxe) && breakable)
 		var/obj/item/weapon/pickaxe/digTool = W
 		visible_message("<span class='danger'>[user] starts digging [src]!</span>")
 		if(do_after(user,digTool.digspeed*hardness) && src)
 			visible_message("<span class='danger'>[user] finished digging [src]!</span>")
 			Dismantle()
-	else if(istype(W,/obj/item/weapon)) //not sure, can't not just weapons get passed to this proc?
+	else if(istype(W,/obj/item/weapon) && breakable) //not sure, can't not just weapons get passed to this proc?
 		hardness -= W.force/10
 		visible_message("<span class='danger'>[user] hits [src] with [W]!</span>")
 		if(material == get_material_by_name("resin"))
@@ -163,7 +181,7 @@
 		else
 			playsound(src, 'sound/weapons/smash.ogg', 50, 1)
 		CheckHardness()
-	else if(istype(W,/obj/item/weapon/weldingtool))
+	else if(istype(W,/obj/item/weapon/weldingtool) && breakable)
 		var/obj/item/weapon/weldingtool/WT = W
 		if(material.ignition_point && WT.remove_fuel(0, user))
 			TemperatureAct(150)
diff --git a/icons/obj/keys.dmi b/icons/obj/keys.dmi
new file mode 100644
index 0000000000..cd301f910d
Binary files /dev/null and b/icons/obj/keys.dmi differ
diff --git a/vorestation.dme b/vorestation.dme
index d45f0f0880..ca8966d122 100644
--- a/vorestation.dme
+++ b/vorestation.dme
@@ -1305,6 +1305,7 @@
 #include "code\game\objects\items\weapons\handcuffs_vr.dm"
 #include "code\game\objects\items\weapons\improvised_components.dm"
 #include "code\game\objects\items\weapons\inducer_vr.dm"
+#include "code\game\objects\items\weapons\keys.dm"
 #include "code\game\objects\items\weapons\manuals.dm"
 #include "code\game\objects\items\weapons\manuals_vr.dm"
 #include "code\game\objects\items\weapons\mop.dm"