Description:

Smooth Cutting: This kit replaces 50 individual drill bits, a double-slot design for faster, smoother cuts, and a 3-sided (TRI-FLAT) holder that does not slide in the drill chuck.. And Durable: Long-life high-speed steel, coating to reduce friction and run the cooler, automatically remove holes when drilling. Prevent Slippage: The large drill has a three-sided shank and the small drill has a hex shank to prevent the drill chuck from sliding and coated with cobalt for a smoother cooling cut.. Package: Including five different sizes of step drill, this set of step drills is packed in a box and you can store them easily. The package size: 15cm * 10.5cm * 4.2cm (length * width * height).