Remove and replace hollow split roll pins easily and safely using these special-built round-nose punches. The round tip locks into the pin to keep the punch from slipping and damaging receivers, trigger assemblies, and other fragile mechanisms. Machined knurling also helps you maintain a secure grip and retain control of the punch. Made of through-hardened 4140 steel for maximum strength and years of dependable service. Mfg: Lyman SPECS: 4140 chrome-moly steel. Set of 4 punches, approximately 4" (10.2cm) long, in 1⁄16" (1.6mm), 3⁄32" (2.4mm), 1⁄8" (3.2mm), and 5⁄32" (4mm) diameters.