Added a forging hammer as prep for blacksmithy.

code/modules/crafting/slapcrafting/crafting_recipes/tool_crafting/_tool_crafting.dm

@@ -35,6 +35,10 @@ var/global/list/_tool_crafting_components = list(
 	/obj/item/tool/axe = list(
 		/obj/item/tool_component/head/handaxe,
 		/obj/item/tool_component/handle/short
+	),
+	/obj/item/tool/hammer/forge = list(
+		/obj/item/tool_component/head/forging_hammer,
+		/obj/item/tool_component/handle/short
 	)
 )
 

code/modules/tools/components/head.dm

@@ -58,3 +58,8 @@ var/global/list/_tool_properties_cache = list()
 	icon_state           = "sledgehammer"
 	w_class              = ITEM_SIZE_NORMAL
 
+/obj/item/tool_component/head/forging_hammer
+	name                 = "forging hammer head"
+	desc                 = "The head of a forging hammer."
+	icon_state           = "forging"
+	w_class              = ITEM_SIZE_NORMAL

code/modules/tools/subtypes/hammers.dm

@@ -79,3 +79,18 @@
 		TOOL_SHOVEL         = TOOL_QUALITY_DECENT
 	)
 	return tool_qualities
+
+/obj/item/tool/hammer/forge
+	name        = "forging hammer"
+	desc        = "A heavy hammer, used to forge hot metal at an anvil."
+	icon        = 'icons/obj/items/tool/hammers/forge.dmi'
+	w_class     = ITEM_SIZE_NORMAL
+
+// Forging hammers are not great at general hammer tasks (too heavy I guess),
+// and also don't work as crowbars due to missing the nail ripper/flange,
+// but will be more effective at forging when blacksmithy is merged.
+/obj/item/tool/hammer/forge/get_initial_tool_qualities()
+	var/static/list/tool_qualities = list(
+		TOOL_HAMMER  = TOOL_QUALITY_MEDIOCRE
+	)
+	return tool_qualities