Special Features: *Chuck capacity : 10mm (3/8″) *Variable speed with pre-set dial for tapping of various tap sizes *Automatic reversing mechanism backs tap out of threaded hole at high speed. Capacity Steel: M8 (5/16″) Aluminium: M10 (3/8″) Power Input 285W No-Load Speed Forward: 60~330/min. Backward: 120~660/min. Overall Length 410mm (16-55/32″) Weight 2.7kg (6.0 lbs.)