The Wheeler Engineering Roll Pin Punch Set is machine from hardened steel to prevent bending or breaking while driving roll pins. These punches are designed with a ball profile tip to provide proper alignment of the roll pin and prevent damage to the firearm or roll pin. This 9 piece set includes 5/16", 1/4", 7/32", 3/16", 5/32", 1/8", 3/32", 5/64", 1/16" punches. These machined hardened steel punches with knurled handles have a ball profile tip to prevent damage to the roll pin and the firearm. The set comes with a polyester case that rolls up for easy storage.