V40(1-1/2") 40mm Full Bullnose Diamond Hand Profiler/Router Bits with 5/8-11 Thread for Granite Countertop Specification: -For 40mm(1-1/2") thick full bullnose edge; -Stone thickness: 40mm; -Outer Diameter: 75mm; -POS: Coarse(35/45#); -Fits on polishers/ grinders with 5/8"-11 thread spindle; -The nylon guide assure the profiled edge remains straight; -Utilizing vacuum brazed diamond technology; -Wet or dry application,optimal speed 3,500- 4,000 RPM. Diamond hand profilers V40 fit on any variable speed grinders or polishers with 5/8"-11 thread spindle. They are designed for 40mm full bullnose edge of natural stones, engineered stones and concrete countertops. Adopting the latest "Vacuum Brazed Technology", our profilers give you aggressive grinding action and longevity, without losing the shape of the profile, unlike the Sintered profilers on the market.A nylon guide on the top of the bits slides along the surfaces steadily and the rotary touch bearing controls the depth smoothly. They have internal water feed for cooling. Optimal speed is 3,500-4,000RPM. Can be used wet or dry. Good Tools, Easy Work！