Deli Step Drill Bit (4-20mm) - ريشة بلبل

Product Description This versatile 4 mm–20 mm step drill bit is designed to drill multiple hole sizes with a single tool—ideal for sheet metal, aluminum, plastic, and thin steel. Its stepped design eliminates the need to swap bits, while the spiral flutes and self-starting tip ensure clean, burr-free holes every time. Crafted from high-speed steel (HSS) and finished with black oxide or optional TiN coating, this bit is built for longevity and performance in both professional and DIY settings. Key Features Hole Size Range: 4 mm to 20 mm by 2 mm steps—drill nine hole sizes with one bit Material: High-Speed Steel (HSS) for hardness and wear resistance Black oxide finish reduces friction and prevents corrosion Optional titanium (TiN) coating for longer life and cooler drilling Shank: 1/4" hex shank or 8 mm round shank with 3-flat grip—prevents slipping and works in impact drivers or drills Tip Design: Self-starting, split-point tip prevents wander and pilot drilling Flutes: Spiral or dual-flute design improves chip evacuation and drilling speed Finish: Laser-etched size markings for quick hole identification Int code: C3