6pcs Diamond Drill Bits Set, Extended Diamond Vacuum Brazed, 3/16 1/4 5/16

Highlights

• 34mm Ultra Diamond Surface: Features an ultra-wide 34mm diamond-coated grinding surface (over 3 times wider) for accelerated material removal and smoother drilling. The high-hardness diamond resists wear, guaranteeing cleaner, more precise holes and significantly longer tool life
• Essential Sizes & Anti-Slip Start: This streamlined set includes 5 essential diamond core bits (1/2", 3/8", 5/16", 1/4", and 3/16"), plus 1 carbide pilot drill for accurate, slip-free hole initiation. Perfect for fast drilling. Features a 1/4" hex shank for secure fitting and quick changes in most electric hand drills
• Extreme Durability & Grit Retention: Utilizes advanced Brazed Diamond Bonding to permanently fuse the diamond layer to the premium carbon steel body. This process prevents premature grit loss, boosting wear resistance, heat tolerance, and impact durability to deliver consistent, long-lasting, high-efficiency performance
• Clean & Convenient Dry Drilling: Each bit is filled with premium cooling wax for superior internal heat dissipation, eliminating the need for external water cooling. This design effectively reduces overheating and wear, ensuring your dry drilling is smoother, cleaner, and faster
• Pro-Level Accuracy for Hard Materials: Engineered for precise drilling and edge grinding in hard and brittle materials like ceramic tile, porcelain, granite, and quartz. Our design delivers smooth, accurate, and chip-free cuts, ensuring pro-level accuracy that protects your valuable materials from cracking and ensures a professional finish