Features:
1.Unique Two Flute Design:Two Flute Design also lets the material particles escape easily for a much more clean drilling operation. Industry grade High Speed Steel with titanium coating can reduce friction and run cooler, which ensures wear-resistance and durability.
2.Wide Application:with the cone drill bit, you may easily drill different kinds of holes on sheet metal, aluminum sheets, wood chips, plastic and wood board. It's a perfect choice for DIY and engineering use.
3.Hex Shank:Each unibit step drill bit optimally fits into power tools such as impact drill chucks securely and eliminates slip for higher efficiency of output.
Package Include:
Bit #1 (6 steps): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
Bit #2 (13 steps): 1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"
Bit #3 (9 steps): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4".