Features 1、One piece for multi-purpose, can drill holes of different diameters, open and ream, deburring, and accurate drilling 2、X-shaped opening design effectively reduces drill bit slippage, universal hex shank type 3、Laser scale, the diameter is clear at a glance, the marking is very clear 4、When machining round holes of different sizes on thin materials, there is no need to replace the drill bit, which saves time 5、Can drill wood, stainless steel, plastic plate, copper plate, aluminum plate Specification Item Type: Step Drill Bit Material: High speed steel Uses: Drilling wood, stainless steel, plastic plates, copper plates, aluminum plates Applicable Equipment: Electric drill, bench drill, battery drill, etc. Shank Type: General hex handle Size(approx.) Number of Steps Blade length per step(approx.) Shank diameter(approx.) Total length of cutter head(approx.) 4 ~ 12mm / 0.2 ~ 0.5in 5 7mm / 0.3in 6.35mm / 0.3in 43mm / 1.7in Package List 1 x Step Drill Bit