Irwin Tools IRWIN Unibit #21 13/16-Inch to 1-3/8-Inch Step-Drill Bit, 1/2-Inch Shank (10221), Black
IRWIN Unibit #21 step-drill bit (10221) enlarges holes 13/16"–1-3/8" in thin materials; single-flute design for clean, true round holes, 3-flat 1/2" shank prevents slipping, limited lifetime warranty.
$186.32 $186.32
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UOM Quantity
1 Available Quantity
0 GSA Compliant
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Single-flute cutting edge for greater control through steps. Pilot hole required. Also available with titanium nitride coating for longer life. Patented single-flute cutting edge gives the user a true round hole every time. Ideal for drilling holes into thin materials such as stainless steel, copper, brass, aluminum, plastic and laminates. 3 flatted shank prevents slipping in drill chuck. Irwin Unibit #21 step drill bit (10221) offers 10 hole sizes (13/16" - 1-3/8") in 1/16" increments and a 1/2" shank for secure chucking. Finish: Brushed. Material: Blend. Limited Lifetime Warranty.
- Hole enlarging: Suitable for 13/16-inch to 1-3/8-inch diameter holes in thin materials
- Material compatibility: Ideal for drilling holes in metal, plastic, and laminates
- Cutting edge: Single-flute design, ensures true round hole in thin materials
- Shank type: 3-Flat, 1/2-inch diameter, prevents slipping in drill chuck
- Step drill #21: 13/16-inch to 1-3/8-inch capacity, 10 size options
Specifications:
| Materials & Construction | |
| Color | Multi |
| Material | Blend |
| Outer Material | Blend |
| Product Details | |
| Cutting Angle String | 135 Degrees |
| Cutting Diameter | 1.38 Inches |
| Finish Type | Brushed |
| Material | Blend |
| Number of Flutes | 1 |
| Number of Pieces | 10 |
| Set Name | Single Piece Set |
| Shank Type | 3-Flat |
| Surface Recommendation | Aluminum,Brass,Copper,Metal,Plastic,Stainless Steel,Steel,Wood |
| Tool Flute Type | Straight |
| Unit Count | 1.0 Count |
| Sizing & Dimensions | |
| Height | 1.25 inches |
| Length | 6 inches |
| Product Dimensions | 6 x 3 x 1.25 inches |
| Size | One Size |
| Weight | 1.59 ounces |
| Width | 3 inches |
| Technical Specifications | |
| Included Components | STEP DRILL #21 13/16-1-3/8IN 10 SZ |
| Measurement System | Inch |
| Warranty | Limited Lifetime Warranty |
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