Twofold ground main cutting edges and circumferential cutters. Effective plug length is max. 2 inch. For the plug production for filling knot holes or fixing partial wood damage in combination with Bormax®. For precise fitting use FAMAG drill bits. Place 1616 at the workpiece's edge in a way that the circular ring is opened sidewise and a good removal of the chips is guaranteed. Alloyed tool steel. 400 - 1000 rpm. e.g. Ø 1/2 ich 1200 rpm in soft wood