Raizi Full Bullnose/Demi-bullnose Diamond Hand Profiler Router Bits was designed for fabricators that need to deal with the variety of thicknesses that is inherent in all stone slabs. Whether you are working with granite, engineered stone, concrete, porcelain, crystallized glass, marble or limestone and the slab has a specified thickness, such as 1-1/4” (3cm), the nature of the material does not always match the exact specification. Specification: Speed: 3500 rpm Grit: #35/45 Thread: 5/8"-11 Shape: V shape Full bullnose/B shape Demi-bullnose Usage: wet or dry Application: granite, quartz/engineered stone, concrete, porcelain