The Ruko 101026TRO Step drill bit set features high-speed steel construction with a triangular shank for improved grip. This set includes three drill bits with sizes ranging from 4 mm to 30 mm, ideal for precise drilling in sheet metal. Designed for quick-helix performance, it is suitable for professional and DIY applications. https://elecena.pl/product/28443638/ruko-101026tro-step-drill-bit-set-3-piece-hss-triangular-shank 2025-04-16 https://elecena.pl/product/28443638/ruko-101026tro-step-drill-bit-set-3-piece-hss-triangular-shank 2026-07-04