The Wheeler Engineering Roll Pin Punch set is machined from hardened steel to prevent bending or breaking while driving any size roll pin. The punches are designed with a hemispherical tip to provide proper alignment of the roll pin to prevent damage to the firearm and the roll pin. The 9 piece set includes: 5/16a ^2, 1/4a ^2, 7/32a ^2, 3/16a ^2, 5/32a ^2, 1/8a ^2, 3/32a ^2, 5/64a ^2, 1/16a ^2 punches in a nylon pouch. Features: 9-piece set 1/16a ^2 through 5/16a ^2 Hardened Steel construction Hemispherical Tip Fitted Nylon Storage Pouch For the best selection firearms tools and maintenance supplies, shop Palmetto State Armory!