3Pcs JelBo Titanium Coated Step Drill Bit Set - HSS Hex Shank Metal Multiple Hole Kit With Impact Driver For DIY Woodworking, Metal & Plastic Review

【QUALITY MATERIALS】Forged from titanium coated high speed steel.Make these step drill bits has high hardness. 【EFFICIENT OPERATION】In the drilling process, the step drill bits shakes less than the twist drill bits, and has a clear scale mark. 【MULTI PURPOSE】This set of step drill bits is suitable for drilling of thinner stainless steel, carbon steel, aluminium plate, iron plate and other materials. 【ANTI-SKID DESIGN】The hex shank of step drill bits adopts groove design, help the electric drill clamp it more firmly, prevent sliding or falling off during rotation. 【VARIOUS SPECIFICATIONS】The step drill bits set has 28 different apertures. They can process different kinds of diameter holes, which greatly saves you a lot of trouble.