Set of spiral wood drill bits designed for professional use Useful for drilling in soft and hard wood, plywood and chipboard, carpentry and wood fiberboard. • Made of high-grade HSS 4241 steel• grinded• centering blade provides precise drill guidance• helix design allows for fast discharge of spoil during operation, which reduces drag and increases drilling speed• made from a single piece of HSS 4241 steel, making them strong and durable• HEX 1/4" shank (6. 3 mm)• set of 7 drill bits in sizes: 3, 4, 5, 6, 7, 8, 10 mm
