Maximum Capacity in steel 13mm Maximum Capacity in wood 32mm Maximum Capacity in concrete 28mm Maximum Capacity TCT core 54mm Maximum Capacity diamond core 65mm 1 year manufacturer warranty with a further 2 years when registered within 30 days of purchase. This guarantee does not apply where non-genuine or recommended parts or accessories are fitted to the tool. The use of non-genuine or compatible batteries and chargers with Makita Tools will invalidate the Makita guarantee for our tools.