Twofold ground main cutting edges and circumferential cutters. Effective length of the plug max. 70 mm, For the production of plugs for filling knot holes or fixing partial wood damage in combination with Bormax®. For precise fitting use FAMAG drill bits.Place 1616 at the edge of the workpiece in a way that the circular ring is opened sideways and a good removal of the chips is guaranteed. Alloyed tool steel 400 - 1500 rpm e.g. Ø 15 mm 1000 rpm in soft wood