MOSTARTOOLS 1/2 Inch Demi Bullnose Edge Vacuum Brazed Hand Profiler diamond Router Bit Profile Wheel is used as an edge engraving tools for profiling Bullnose edge on granite, quartz, porcelain, engineered stones and concrete countertop. The Vacuum Brazed Technology brings the router bit aggressive grinding action and longevity, without losing the shape of the profile.Our diamond profile Wheel is with 3 Inch diameter.The internal water holes are designed for continuous water flow to keep stone countertop edges continuously cool, wet and lubricated while grinding. Standard 5/8"-11 threaded arbor fits angle grinders, held grinders and polishing machines.It will be a good choice for a contractor and operator