Features- Heavy duty construction - ideal for site work Percussion action for drilling pilot hole. Rotary action for dry diamond core drilling. Torque limiter to prevent operator injury if the core bit snags. Excellent for plumbers, electricians, general contractors, hirers. Specifications- No load speed 0 - 1500 rpm Net weight 3.5 kg Max in masonry 20 mm Input wattage 850 w Max in steel 13 mm Max in wood 30 mm Blows per minute 0-22500 bpm Max dry diamond core 152 mm. Supplied with- Side handle Carry case.