149010064 Impact Step Drills P&N Quickbit Impact Step Drills are ideal for sheet metal without pre-drilling. During drilling, the next step deburrs the previously drilled hole. These bits are suitable for use in sheet metal, aluminium, plastic & fibre glass, The P&N Quickbit range has been specifically developed to provide quick change-over of standard 1/4? hex shank power bits. This comprehensive range of power drill bits and accessories is for trade and home handyman use and allows the operator to simply and efficiently use one power tool for all operations. Central to the range is the Quickbit Adaptor, which aids in the simple change over and instant locking of any 1/4? hex shank bit without the use of a chuck key. Changing from a drill to a screwdriver bit is no longer a laborious task. Theres no more need for repetitious chuck loosening and tightening or using two drills. 1/4" hex shank suits impact drivers and quick change adaptors Fixed drilling steps incrementally increases hole size in a controlled manner Non-skid tip is easy to sharpen Straight flute with two cutting edges for greater control through steps Made from M2 High Speed Steel (HSS) offering the best combination of strength, heat & wear resistance TiN coating provides 3 to 6 times longer tool life than uncoated tools and is suitable for general purpose use in a wide range of applications Shank 1/4 Steps - 10 Diameter 5/32, 1/4, 5/16, 3/8, 1/2, 9/16, 21/32, 3/4, 7/8, 1"