• High-quality and durable steel.• The spiral segment is made of HWM tungsten carbide of premium quality.• 2 edges (Z2) + 2 teeth with scoring and radial abrasion (V2).• 2 spiral flutes.• Parallel shank with a driving flat surface and length adjustment screw.• Recommended speed 1-4 m/min. - 6000 rpm.Recommended use:Ideal for chipboard, MDF, HDF and laminates. Ideal for through holes into thin boards - with the possibility of higher rpm and feed speeds. For chucks on doweling machines.