Best in class durability. Best in class grinding performance with a powerful 600W motor. Newly-designed large fan and optimized air flow ensure efficient motor cooling for a long lifetime. Smallest grip circumference in its class*1 for more comfort. Capacity: Wheel Dia 100mm (4″). Capacity: Hole Dia 16mm (5/8″). Spindle Thread M10 x 1.5. Power Input 600W. No Load Speed 11,500/min. : 220-240V, 12,000/min. : 110-120V. Overall Length 254mm (10″). Weight*3 1.7kg (3.8lbs.).