"Sharpen the most common drill bits in under a minute using an easy 3-step sharpening system that makes everyone a drill sharpening expert. The Darex V390 sharpens drill bits 1/8in.-3/4in. 3-19mm and 118 to 140 with ease. U.S.A. Usage DIY to professional level, Angle Sharpening deg. 118-140, Max. RPM 3,450, Accepts Bits in. 1/8-3/4 in. dia., Amps 4.5, HP 1/3, Grit 180, Machine Type Manual, Product Type Bit sharpeners, Volts 115, Wheel Diameter in. 3. Includes an adjustable split-point feature and relief control for greater point style variation Recommended for light duty - 35-50 drills per week Comes standard with Borazon wheel for HSS and cobalt drill bits Optional diamond wheels for carbide bits sold separately"