Drill multiple size holes with one bit. Drill sheet metal and aluminum without deforming or distorting. Bits start on contact, deburr and chamfer while drilling and do not require a center punch. Titanium nitride coated high speed steel.
Each set includes one each of the following:
- 6-step bit – 3/16 in. to 1/2 in. steps
- 9-step bit – 1/4 in. to 3/4 in. steps
- 13-step bit – 1/8 in. to 1/2 in. steps