This sharpening machine handles drill bits from 1/8 to 5/8 inch. An adjustable point angle from 95 to 135° allows the geometry to suit different materials and applications. The cubic boron nitride wheel works with high-speed steel, while the 5,800 rpm motor speeds sharpening. Thirteen collets and two collet chucks are included, along with a durable carbon-steel housing for workshop or garage use