This 5 piece set includes 3/16", 1/4", 5/16", 3/8" and 1/2" ANSI bits. The German chisels have a unique tip that minimizes the possibility of chisel movement when beginning to drill a hole.This feature makes the chisels exceptionally easy to center.They also quickly cut through 10-gauge wire mesh embedded in reinforced concrete, which can also be used for drilling holes used in hacksaw blades and other hardened steel work.