APEXX Shape V Bullnose Brass-Core Router Bit - Position 1. 4CM. RPM: 6,000 - 10,000. Brass core to preserve diamond strength, reduce vibration, dissipate heat and increase the life and performance of the tool; APEXX Profile V is commonly known as Full Bullnose or just Bullnose; One of the classic and most popular edge profiles; Fit Master-3500, Sector, Magnum, Hercules, Red Ripper and all other standard stone routers; Position-1 profiles the stone edge and Position-2 smooths the edge to reduce the time on polishing afterwards; Position-3 is available for V30 to achieve extra smooth edges; Material: Engineered Stone, Granite, Marble; Wet use only.