The HD45 is designed for drilling holes in concrete rock or masonry from 3/4 in. / 19 mm to 2 in. / 50 mm in diameter and up to 29 in. / 73.7 cm deep as well as core drilling up to 4 in. / 102 mm in diameter. The HD45 uses a Skil 736 shank carbide tipped fluted drill bits and requires no fluid or compressed air to clear holes during operation. The HD45 features a feathering trigger for easy starts adjustable rotation speed (both forward and reverse) and is furnished with hose whips and flush face quick disconnect couplers.