Countersinking attachment for wood drills. Boring and countersinking in a single operation by fitting to machine wood drills. Will cut all types of wood, laminated panels and many plastics For boring and countersinking in one operation for sinking in screw heads. You get the following dimensions by using: (Ødrill/ countersink size): 3/10,5, 4/11,5, 5/12,5, 6/13,5, 8/14,5. Professional carbide tipped adjustable countersink, countersinking angle 90° or 180°, two-part version. Can be clipped on all machine drills Ø 3-8 mm