The Battenfeld 710910 Wheeler Engineering Roll Pin Punches are expertly designed and constructed from hardened steel to withstand any size roll pin without the risk of bending or breaking. Every punch sports a hemispherical tip, purposefully fashioned to correctly align with the roll pin. This key feature avoids any potential damage to both the roll pin and the firearm.The 9-piece set comprises of a range of sizes to accommodate all needs, these include: 5/16, 1/4, 7/32, 3/16, 5/32, 1/8, 3/32, 5/64, and 1/16 punches. For convenience and durability, the punches come in a hard-wearing nylon sheath.