"Performance through the opportunityOEM service and ODM service are availableMasonry drill bits made of high grade steel with tungsten carbide tips, For use with percussion drills of all makes,Suitable fore natural stone and brick work. Good quality, long lasting bits. Masonry and Concrete Drill Bits,Premium Qualityâ The tungsten carbide tip is set and brazed into the drill head to precise criteria .â Renforces the steel surface reducing breakage risks.â Made of 40 Chrome alloy steel.Full heat-treatment,Sandblastingâ Made by Greetools. Wear suitable eye and ear protection when using these productsAvailable in ranges of sizes, Selected diameters are available in set"