Special Features: *Durable Aluminium body and also double insulation: The world’s first featured in this class *Powerful Input 705W motor & compact: Max output 900W *Hitachi’s original snap switch for better usability Capacity Wheel Dia.: 100mm(4″) Hole Dia.: 16mm(5/8″) Power Input 705W no-Load Speed 12,000/min. Spindle Thread M10x1.5 Overall Length 258mm(10-3/16″) Weight 1.5kg(3.3 lbs.)