Screw Auger, Lewis Pattern. Depending on one’s skill and strength

The pilot-drill bit is ideal for drilling at an angle which is not 90° in workpieces surface, which occurs for example in the construction of staircase. Can be used with the centre point as traditional Bormax

TCT brad point drill bit, cylindrical, two main cutting edges, two taper taps. Spiral form N.
4.000 – 10.000 rpm e.g. Ø 5 mm 8.000 rpm in European hard wood. Further details in the speed diagram.

Traditional Forstner bit with centre point, two main cutting edges and two circumferential cutters. Low friction due to the reduced peripheral cutting edge

Specially formed channel for removing chips, teflon-coated, changeable crest of thread HSS, two carbide tipped main cutting edges, protruding cutting edges and cylindrical shank with three clamping surfaces. Ground by diamond wheels on CNC-machines

“Lewis” pattern with crest of thread, main cutting edge and bottom blade.
700 – 2250 rpm e.g. Ø 12 mm 1500 rpm in European hard wood. Further details in the speed diagram