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"Now you can effortlessly drill a hole with precision and reduce breakout without breaking a sweat, turn any complex drilling task into an easy one with the Ultimate Punching Drill Bits.It is designed with strong tungsten carbide tips that can easily penetrate various materials such as tiles, concrete, ceramics, glass, and other surfaces!The triangle &amp; overlord design allows for stable holing power drills while the U-shape groove for effective scraps and heat discharge which results in fast and efficient drilling!\nFEATURES\n\nIndustrial DesignSpear-shaped design will effectively reduce breakout. Triangle shank allows for stable holing in a power drill.U Shape Groove TwistU-shape groove allows for effective scraps and heat dischargePremium QualityTungsten carbide tipped cutter, built for faster penetrating, prolonged life, and heavy-duty use. The surface is painted and full grinding processing with anti-rust treatment.Widely ApplicableThese masonry drill bits can easily penetrate tile, concrete, ceramic brick, glass, plastic, cinderblock, wood, and more.\nSPECIFICATION\n\nMaterial: Hard Alloy, Tungsten carbide \nOptional Style:   Overlord, Triangle  Drill Set\nWeight: Approx. 20-69g\nBlade Diameter: 6mm, 8mm, 10mm, 12mm\n\n PACKAGE INCLUDES\n\nUltimate Punching Drill Bits\n"
<https://gonutties.com/products/ultimate-punching-drill-bits>