Forets étagés coniques, 6-60 mm, 12 étapes, acier rapide, argenté, axe rond, goujure conique hélicoïdale, pour bois, métal et plastique

Stepped drill bit: 6-60 mm (12 steps: 6, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 mm). Shank diameter: 11.5 mm. Material: HSS 4241. Applications: Suitable for workpieces with a hardness below 25°, such as carbon steel, sheet metal, insulation board, PVC board, wood, and timber. Workpiece thickness less than 5 mm. Note: Use water cooling during drilling to extend drill bit life. Recommended drilling speed: 250-400 rpm. Spiral flutes: 135 flute tip and double-edged design for self-centering and deburring; spiral flutes help remove chips during drilling; unique stepped design allows one drill bit to drill holes of different sizes, equivalent to a drill bit and high-speed steel tool, combining hardness and toughness, high wear resistance, suitable for most general applications. Versatile for deburring, chamfering, and reaming.