Designed to produce 3/16in, 3/8 in, 1/2 in or 3/4 in demi-bullnose edge on slabs and tiles. Equipped with a 5/8 in-11 female thread and internal water passage holes, the Alpha® Profiler B-Series will fit the AIR-680, AWP-158, VSP-320 and other brands of center water-feed polishers. The nylon guide slides along the surface and the rotary touchier controls the depth of cut to make this tool nearly “goof-proof”.