Irwin - Unibit Step Drill Bits - 3 Piece Set

These cone-shaped bits have steps of increasing diameter marked along their cutting head. As each bit is pushed into a piece of sheet metal or other thin material, each step on the bit widens the hole. The bits also have a self-starting split point that prevents the bits from moving, or walking, when starting to drill, which eliminates the need for using a center drill to create a starter hole before drilling.

• This kit has 17 hole sizes from 1/8" to 3/4"
• Titanium Nitride Coating
• Speedpoint Tip
• Materials: Steel, Plastic, Wood, Copper, Brass
• Includes storage case

Bit Steps:
- 1/4" to 3/4"
- 1/8" to 1/2"
- 3/16" to 1/2"