Irwin 10502826 Blue Groove Flat Bit x6 Pc Set The Irwin Blue Groove 4x Flat Bits have a patented groove point and cutting edge. The cutting edges cut the timber 4 times faster, without scraping. The parabolic scoop optimises control and removal of wood chips. FEATURES The large shank is 152mm in length Relief angle from 12° to 17° 10% larger in diameter for added durability CONTENTS 1x 10mm Flat Bit 1x 13mm Flat Bit 1x 16mm Flat Bit 1x 19mm Flat Bit 1x 22mm Flat Bit 1x 25mm Flat Bit