E16 Bevel Brazed Router Bit 1/2" shank w/ bearing. For creating 45 degree bevel edge on 2cm (3/4") thickness granite or marble slabs. Cutting depth is 16mm or 16/25", less then 3/4" Diameter of the bit is 38mm or 1-1/2". 1/2" Shank to fit conventional wood routers 40/50 grit diamond ideal for cutting marble, granite, glass and more Use wet or dry. Water or cooling agent recommended for longer bit life. Bottom Bearing to keep the bit from over cutting granite.