M35 Cobalt Steel Step Drill Bit,for Stainless Steel Metal Iron Copper Aluminum&Wood,5% Cobalt HSS-Co,11 Sizes 3-13mm Drill Bit

About this item: M35 Cobalt Steel Step Drill Bit for Extreme DurabilityCrafted with M35-grade 5% cobalt HSS-Co, this cobalt step drill bit set outperforms standard drill bits with superior heat resistance and 3x longer lifespan. The added cobalt allows 20% faster cutting speeds on stainless steel, carbon steel, and hard metals while reducing tool changes 11-Size Drill Bit Set for Metal (3-13mm)Cover all drilling needs with 11 precision-sized steps (3mm to 13mm) in one drill bit kit. Laser-etched size markers ensure accuracy when creating or enlarging holes. Perfect for drill bit set for steel applications eliminates swapping multiple bits for DIY or professional projects Dual-Flute Design & Hex Shank for Maximum EfficiencyDouble spiral flutes clear metal chips 50 faster than flat-flute bits, while the 1/4" hex shank locks securely in drills/drivers for zero slippage. The countersunk drill bit kit design self-starts on curved surfaces and delivers burr-free holes in copper, aluminum, and sheet metal Heavy-Duty Drill Bit Set for Steel & Hard MetalsOptimized for high speed steel drill bit set demands Works with pistol/bench drills to penetrate stainless steel, brass, iron, and titanium. Rigorously tested for 10,000+ rotations without edge chipping

• 🚚 Envío rápido
• 🔒 Pago seguro
• 🛡️ Garantía incluida
• 💬 Soporte por WhatsApp