GRACE USA's Roll pin Punch Set is manufactured from the highest quality high carbon molybdenum tool steel and properly heat-treated to ensure the long life of the punch. GRACE USA has incorporated a reverse taper from the tip of punch to help prevent the 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 the wall of the hole and pin and gives added control for driving roll pins in or out.