Portable Drills Bits Sharpener has the following advantages.

Creative design:
Creative direct current motor instead of traditional alternating current motor;
Long-time operation without stopping the machine;
Can automatically sharpen 10 different kinds of drills at one time;
Low cost but excellent quality;
Various kinds of applications: Workroom, factory, building industry...

Tchnical Parameter:
Rated Voltage: 120v/230v
Frequency: 60Hz/50Hz
Grind Angle: 118'
Range of Grinding: 3mm-10mm
In Metric: 3, 4.5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10mm
In British: 1/8, 11/64, 13/64, 7/32, 15/64, 1/4, 9/32, 19/64, 5/16, 23/64, 3/8 inch