Grace USA Steel Roll Pin Punch Set 12 pcs. Each punch is hardened the entire length with tempered striking end and are certerless ground for complete accuracy. We have incorporated a reverse taper from tip of punch to help prevent punch from sticking in the work piece. The pilot point (ball on end) that fits into the hollow center of the roll pin helps prevent damage to wall of hole and pin and gives added control for driving roll pins in or out. The Grace USA Roll Pin Punch has three identiying machine marks to help distinguish between our regular pin punches. Punches are manufactured from hex stock vs. round which helps stabilize punch from rolling away from user. Specifications for Grace USA 12 Piece Steel Roll Pin Punch Set: Manufacturer: Grace USA Fabric/Material: Steel Condition: New Quantity: 12 Features of Grace USA Professional 12 Pieces Punch Set Sizes are 1/16" 5/64" 3/32" 1/8" 5/32" 3/16" 7/32"1/4" 5/16" 3/8" 7/16" 1/2" Package Contents: Grace USA Professional 12 Pieces Steel Roll Pin Punch Set Grace USA GRRS12: Steel Roll Pin Punch Set 12 pcs