All ball bearing construction provides greater durability and longer tool life. Contoured textured handle provides better gripping surface and reduces user fatigue. Glass filled nylon housing is durable, impact resistant and provides lower maintenance cost. Belt clip conveniently holds tool and frees user's hands. Specs: 0-2,500rpm no load speed, 480w max watts out, capacity: wood (spade bit) 1 in , wood (hole saw) 1-1/8 in and steel (twist bit) 3/8 in , single gear reduction, pistol grip handle, anti-slip grip and weighs 3.2lbs.