4-32mm Step Drill Bit

If you need to drill perfectly round holes in a variety of materials,
you need this drill bit.
Made from HSS steel, the cutters have 3 sided shanks to prevent slippage when in the chuck
and 2 fluted edges for a faster, smoother cutting action.
Use to Cut Holes in a Variety of Materials Including:
Steel,Brass,Wood,Plastic.