Decorative and functional eyelets used to prevent holes from tearing in leather. Material: steel Post: 6mm (1/4") Pack Size: 100pk Sizes are based on the measurement of the inside diameter (the hole) Outside diameter: 4.5mm: 8mm, 6.5mm: 12mm, 8.5mm: 15mm Can be used with8094-00/ 8095-00/ 8096-00 Eyelet Setters8108-10 Deluxe Snap Setter Set3960-00 Craftplus® Multi-Purpose Leather Hand Press3992-00 Craftplus® Hand Press Eyelet Setting Dies Ivan branded tools are recommended when setting this hardware. Setting tip: Instead of striking the setting tool with two hard, perpendicular whacks using your maul, try giving it multiple lighter taps while rotating the tool slightly in a circle over the shaft (aka collar). This technique helps the edges roll over and prevents the metal from splitting, and results in a cleaner, more secure set.