Drill Bit Sharpener Accommodates drill sizes: 5/64" - 13/64"(2mm-5mm) 7/32" - 21/64"(5mm-8mm) + 11/32" -1/2"(8mm-12.5mm) Angle Stop Degrees: 60 degrees Left Safe and Easy to Use with the Appropriate Built-In Guides 100 Grit Grinding Stone Requires a Power Drill That Operates Between 2000 and 3500 RPM, (sold separately)