Based on this product's specifications, here are some alternatives and similar models
Drill bit STANLEY STA50115 — 1.2 cm diameter, 151 mm length, single piece
Summary description:
Single STANLEY STA50115 drill bit for drilling tasks, with a 1.2 cm (12 mm) cutting diameter and 151 mm overall length. Intended for use with standard drills for wood, metal or plastic depending on bit geometry. Supplied as one piece, suitable for repair, construction and workshop applications where this specific diameter and length are required.