About Drill Bits
Compare material, finish, length class, and decimal size equivalents.
Drill Bits for Stone, Granite, and Slate
Multiple cutting edges on the tip allow these bits to drill quickly through natural stone, granite, and other hard, abrasive material.
Drill bits with flats on shank have three flat sides to prevent the bit from slipping in the drill chuck.
For technical drawings and 3-D models, click on a part number.
Shank | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Drill Bit Size | Decimal Size Equivalent | Overall Lg. | Max. Drilling Dp. | Type | Size | Point Style | Features | Each | |
Inch | |||||||||
Titanium-Nitride (TiN) Coated Carbide-Tipped Steel | |||||||||
| 1/8" | 0.125" | 2" | 2" | Round | 1/8" | Standard | __ | 000000 | 00000 |
| 3/16" | 0.1875" | 2" | 2" | Round | 3/16" | Standard | __ | 000000 | 0000 |
| 1/4" | 0.25" | 2 1/4" | 2.25" | Round | 1/4" | Standard | __ | 000000 | 00000 |
| 5/16" | 0.3125" | 2" | 2" | Round | 1/4" | Standard | __ | 000000 | 00000 |
| 3/8" | 0.375" | 3 3/4" | 3.75" | Round | 5/16" | Standard | Flats on Shank | 000000 | 00000 |
| 1/2" | 0.5" | 3 3/4" | 3.75" | Round | 5/16" | Standard | Flats on Shank | 000000 | 00000 |