Turtle Shell Hook Brass Snap Button Screw Type Brass Press Stud Dot Button Snap Fastener Leather Craft Supplies No special tools required! Can be attached simply by using a grommet punch and folding the prongs! This hook fitting allows for secure snapping and unsnapping. Material: Brass Size: 24 x 20mm Weight per set: Approximately 12.15g Accessories: None Parts 1, 2, 3, and 4 in the second image are the head part set. Assemble parts 1, 2, and 3, and then fold the short prongs to complete. How to attach the head parts: ① Make a 6mm diameter round hole in the leather using a grommet punch (hole punch). ② Make four cuts for the prongs using a 3mm flat-blade punch. ③ Set part 4 and fold the prongs. How to attach the foot parts (5, 6): ① Make a 6.0mm round hole in the leather using a grommet punch (hole punch). ② Set foot part 6 and tighten the screw firmly with a flathead screwdriver. Looks great on wallets, bags, leather jackets, and anything else. Perfect for leathercraft and customizing leather jackets!