
Baoke 3 Times Diameter Internal Cold Drill External Cold Tungsten Steel Carbide Twist Drill Professional Steel Deep Coolant Hole Drill Factory Nano Coating. Customization Options: Supports non-standard, logo, package, and full customization from samples or designs. Fast Delivery: Standard stock items delivered within 2 days; non-standard items within 10 days. High Hardness Material: Made of cemented carbide with HRC 45-68 options for durable steel cutting. Professional R&D Team: Over 20% of staff are researchers with strong mechanical drawing and process design ability. Global Shipping: Supports UPS, FedEx, DHL, TNT, EMS, and Sea shipping with 100% insurance. Factory Direct Sales: Competitive pricing from Changzhou Baoke Precision Tools Co., Ltd with 3 production lines. Wide Application: Suitable for steel, stainless steel, cast iron, aluminum, and wood machining. Quality Assurance: 100% visual and function inspection for finished products before shipment.