Based on this product's specifications, here are some alternatives and similar models
Drill bit KWB 511820 — spiral cutting drill bit, diameter 20 mm, 1 piece
Summary description:
KWB 511820 is a spiral cutting drill bit with a 20 mm diameter, supplied as a single piece. Intended for use with drills, this cutting-type bit provides axial penetration using a spiral flute design to remove material. Suitable for general drilling tasks where a 20 mm spiral drill is required; practical for DIY, repair and woodworking applications.