1. Reinforced Tip Geometry for Challenging Materials The robust 135° point angle is optimized for machining stainless steel, hot-work steel (below HRC40), and other high-hardness alloys. This design fortifies the cutting edge, lowers required thrust, and resists bit "walking" or deviation during entry, delivering enhanced hole location accuracy and prolonged tool durability. 2. Advanced TiAlSi Coating for Stainless & Hardened Steels TiAlSi coating offers a substantial upgrade over standard AlTiN, with dramatically increased surface hardness (3,200 HV versus 2,600 HV) and improved thermal stability, resisting oxidation up to 1,300°C. This composition, coupled with its favorable friction properties, is specifically formulated to endure the severe thermal and abrasive conditions present when drilling into stainless and hardened steels. 3. YFTOOL 4-Piece Carbide Drill Set | Engineered for Precision Tasks This collection of solid carbide drills, comprising 1/16", 1/8", 3/16", and 1/4" diameters, is crafted for detailed, exacting drilling operations. The high-grade carbide substrate provides outstanding stiffness, ensuring maintained dimensional accuracy within ±0.003mm for rigorous applications. 4. Optimized Swarf Removal & Thermal Management A 30° helix angle generates an efficient augering action that rapidly clears lengthy, tenacious chips from the bore. Working in tandem with the chip-breaking effect of the 135° point, this system eliminates jamming concerns. The unimpeded removal of swarf also extracts significant process heat, effectively managing part temperature and mitigating the work-hardening tendency of materials like stainless and tool steel. 5. Ultra-Fine Grain K30 Carbide Core These drills utilize a K30 grade carbide base with a 0.4-micron ultra-fine grain composition. This material provides dual core advantages: exceptional abrasion resistance for increased service life and high structural integrity to resist bending and fracture, guaranteeing repeatable accuracy throughout the tool's lifespan. 6. Performance Benchmark: Up to 1000 Holes Designed for production or repeated use on substrates with a hardness under HRC55, including hardened steel, aluminum, copper, mild steel, tool steel, and carbon steel. Under suitable operating parameters, a lifespan of up to 1000 holes is attainable. 7. Recommended Use & Operational Guidelines Best suited for high-accuracy, stable drilling on CNC machining centers or stationary drill presses. Ample coolant flow is vital for optimal performance and longevity. Use with handheld power tools is not advised. 8. Specialized DLC Coating for Tacky Materials The DLC-coated carbide drill variant is a targeted solution for efficient machining of soft to medium-strength, adhesive materials. It is crucial for operations where eliminating built-up edge and enabling aggressive feed speeds are essential for productivity. 9. Ultra-Fine Grain K20 Carbide Substrate (Alternate Grade) This drill variant is grounded in a K20 grade carbide with a 0.3-micron ultra-fine grain structure. This yields two principal benefits: supreme resistance to wear for extended operational periods and excellent toughness/rigidity to counteract flex and failure, ensuring dependable precision cut after cut