Steel studs

Steel studs can be created by players at level 36 Smithing by using a Steel Bar on an anvil with a hammer in their inventory, providing 37.5 Smithing experience. Steel studs can be used on Leather Bodies at 41 Crafting to create Studded Leather Bodies for 40 Crafting experience, or Leather Chaps at 44 Crafting to create Studded Leather Chaps for 42 Crafting experience.
Steel studs can also be obtained by pickpocketing H.A.M Members.