SELFCUT flat bits feature a self-cutting threaded point and two side cutters. The tip and cutting edges are precision-ground for dimensionally correct bore holes. They have a 1/4" hexagonal shank as per DIN 3126-E6.3. This flat wood bit is outstanding when compared to standard flat wood bits. Suitable for boring holes in medium-hard and soft woods as well as light building materials. A 150mm long extension is available separately. The 6 Piece set contains 13, 16, 19, 20, 22 and 25mm bits.