3/4" granite marble tile demi bullnose ceramic core bit chamfer bit blade buffer

D iamond beveling chamfer bit can bevelorchamfercrated rough holeson glass,granite, marble, stones,ceramic and porcelain tiles. With 5/8"-11 Female Thread arbor. It is a versatile milling bit designed to enlarge, shape and/or round bevel existing holes in Porcelain, Hard Ceramic, Granite and Marble.and it's also suitable to easily create round side indentation necessary to accomodate pipes or electric wire lines.

eBay