Labyrinth construction protects all ball bearings from dust and debris. Small circumference barrel grip for easy handling. Shaft lock for easy wheel changes. Easier repairing of gear section assembled with key. Continuous rating Input : 840W Net weight : 2.0kg (4.4lbs) Power supply cord : 2.5m (8.2ft) Overall dimensions - (L x H x W) : 271mm x 129mm x 106mm No load speed : 11,000rpm Capacity : Depressed center wheel: 100mm (4"), Abrasive disc: 100mm (4"), Diamond wheel: 100mm (4") Spindle thread : DIN type Standard Equipment : Depressed Center Wheel, Lock Nut Wrench, Grip.