The Matco Tools 29-pc Hyper-Step Drill Bit Set, No. DB29HSG, features Matco's proprietary Hyper-Step tip design that quickly cuts sheet metal and hardened metals such as broken fasteners. The multi-stepped tip acts like a step drill, allowing for laser like holes through sheet metal and prevents walking on curved surfaces. There are three-flatted shanks to reduce slippage common with keyless chucks. The drill bits eliminate the need to drill starter pilot holes before making larger hole sizes. The set contains 1/16" through 1/2" by 64ths Hyper-Step drill bits.