The Makita 8406 diamond core drill is a heavy duty machine and is ideal for site work. It has a percussion and a rotary action. The torque limiter makes the machine safer by protecting the user in case the core bit was to snag. This machine has a 850w input wattage. 0-22500 blows per minute. Max dry diamond core 152mm, 20mm in masonry, 13mm in steel and 30mm into wood. 110v machine. 1 years warranty as standard but if registered online within 30 days online at Makita can be extended to 3 years warranty. Percussion action for drilling pilot hole. Rotary action for dry diamond core drilling. Max dry diamond core 152mm, 20mm in masonry, 13mm in steel and 30mm into wood. 0-22500 blows per minute. 850w input wattage. Torque limiter makes the machine safer by protecting the user.