Stainless steel with good plating The screw is suitable for ratchet automatic buckle (sliding buckle) . Quantity: L, M, S 3 size and each size 10 pins total 30 pins (not including belt buckle). A little nails can save your sleeping belt. Please measure and confirm the size of the hole on your belt again before placing the order, so as to avoid unavailability: the diameter of the upper hole is 2-3mm; the size of the lower hole is about 2mm. When installing, if it is a bit long, use pliers to cut it short.