Bullnose Half Bullnose Roundover Vacuum Brazed Diamond Hand Profiler for Granite Concrete Marble Stone 5/8-11 Thread. D AM Os vacuum hand profilers were made so the diamond grains are clearly visible with no extra brazing materials on the grinding surface, greatly enhancing the sharpness and life and durable of the diamond hand profiler. Works great for grinding granite,marble ,etc stones. and concrete tiles countertops edges . 1 (25mm) radius half-bullnose shape Use on most polisher or hand held angle grinder with 5/8 -11 Thread Professional vacuum brazing diamond technology, Wet or dry application, It is recommended to run at about 2,000 rpm in a hand-held angle grinder to quickly cut marble to smooth, rounded edges. Leave the shallow grooves as it has such aggressive quick grit. Diamond hand profiler for edge grinding of granite, concrete, marble, stone, floor tiles, tabletops, etc. UPC 766157530103 Cut Type Round-Over Cut Size Name B25 1'' Brand Name Z-LEAP Item Weight 1.34 Pounds Part Number STLB25 Manufacturer Z-LEAP Diamond Technology Co., Ltd. Material Type Diamond Included Components NO