AIH Rewards: We're excited to announce our new AIH Rewards program. 
Irwin® Unibit® 10220 Hole Enlarging Step Drill Bit, 9/16 in Dia Min Hole, 1 in Dia Max Hole, 8 Steps, 8 Hole Sizes, 7/16 in Shank
PET20
MFG #: 10220
$50.99
/ EACH
- Cutting Edge Material: HSS
- Drill Diameter Measurement System: Imperial
- Finish: Bright
- Hole Sizes Cut: 8
- Letter/Wire Size: #20
- Material: HSS
- Maximum Hole Diameter: 1 in
- Minimum Hole Diameter: 9/16 in
- Number of Flutes: 1
- Number of Hole Sizes: 8
- Number of Steps: 8
- Point Type: SpeedPoint®
- Shank Size: 7/16 in
- Shank Type: 3-Flat
- Step Depth: 1/8 in
- Type: Hole Enlarging
Irwin® Unibit®, 10220, Hole Enlarging Step Drill Bit, Imperial, #20 Letter/Wire, 9/16 in Diameter Minimum Hole, 1 in Diameter Maximum Hole, 8 Steps, 1/8 in Step Depth, 8 Hole, 1 Flutes, 8, 7/16 in Shank, 3-Flat Shank, SpeedPoint®, HSS Cutting Edge, Bright, Applicable Materials: Aluminum, Brass, Copper, Laminates, Plastic and Stainless Steel
- Application
- Item Features
For drilling holes into thin materials
- Single flute cutting edge for greater control through steps
- 3 flatted shank prevents slipping in drill chuck
- Patented single flute cutting edge gives the user a true round hole every time
- Geometry of single flute cutting edge drills true, round holes and provides maximum step control
- Laser etched sizes inside flute for easy and permanent hole size identification
- SpeedPoint® tip for fast starts
- Hex shaped shank secures easily in drill
- #1, #2, #10 and #12 sizes have a quick change shank