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

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

Premium version, fully ground quality with two main cutting edges and two taper taps. Specially ground spiral for a very good chip removal.
2400 – 8000 rpm e.g. Ø 4 mm 5000 rpm in European hard wood. Further details in the speed diagram

One-piece drill bit (C6,3) with brad point, two main cutting edges, two protruding cutting edges and a hexagonal shank for bit holder (1/4“; C 6,3).
Maximum rotation speed of the cordless screwdriver: recommended 3000 rpm

Traditional cylinder boring bit with centre point, two main cutting edges and two taper taps. 700 – 3000 rpm. e.g. Ø 15 mm 2300 rpm in soft wood. Further details in the speed diagram

1664 cylindrical boring bit is a high-quality and versatile tool for precise drilling in wood and plastics. It features carbide-tipped cutting edges for durability and can handle hard and coated materials. The package includes an exchangeable center point, a 4mm pre-drill bit, and an allen key. Suitable for deep hole drilling with extension shanks.