Stanley Black & Decker
Irwin® Unibit® 10231 Step Drill Bit, 1/8 in Dia Min Hole, 1/2 in Dia Max Hole, 13 Steps, HSS, 13 Hole Sizes, 1/4 in Shank
Part #UNB1250
MFG #10231
UNSPC #23241606
Country Of Origin : 
Irwin® Unibit® Step Drill Bit, Imperial, #1 Letter/Wire, 1/8 in Minimum Hole Dia, 1/2 in Maximum Hole Dia, 13 Steps, 1/32 in Step Depth, 13 Hole Sizes, 1 Flutes, 1/4 in Shank, Hex Shank, Self-Starting SpeedPoint® Point, HSS Cutting Edge, HSS, Bright, Applicable Materials: Aluminum, Brass, Copper, Laminates, Plastic and Stainless Steel
- For drilling holes in thin materials such as mild steel, copper, brass, aluminum, plexiglass, wood and laminates
- High speed steel fractional
- Single-fluted cutting edge for greater control and rounder holes
- 3-flatted shank won't slip in chuck
- SpeedPoint® tip for fast starting
- Laser marked sizes won't wear off with use
Minimum Hole Diameter 1/8 in Maximum Hole Diameter 1/2 in Overall Length 3 in Material High Speed Steel Finish Bright Applicable Materials Aluminum, Brass, Copper, PVC, Plasterboard, Plexiglass, Sheet Metal and Steel Cutting Edge Material High Speed Steel Drill Diameter Measurement System Imperial Flute Length 1.68 in Flute Type Trailing Letter/Wire Size #1 Number of Flutes 2 Number of Hole Sizes 12 Number of Steps 12 Point Type Self-Starting Split Series ESD Shank Size 1/4 in Shank Type 3-Flat Step Depth 1/32 in