Marshalltown Diamond Drill Bit System The MARSHALLTOWN Diamond Drill Bit System cuts holes in ceramic, porcelain and marble. Use when installing doors or fixtures in tile. Watering cup and mounting gasket will keep the bit cool and in place when you are drilling. The Diamond Drill Bit System includes eight mounting gaskets. The 5/16" diameter bit helps you produce professional results. The replacement part comes with twelve gaskets. Product Details 5/16" diameter bit cuts holes in ceramic, porcelain and marble Use when installing doors or fixtures in tile Watering cup and mounting gasket keeps bit cooled and hold the bit in place when you are drilling The Diamond Drill Bit System includes eight mounting gaskets The replacement part includes twelve mounting gaskets #28275: Diamond Drill Bit System#29036: 12pk Diamond Drill Bit Replacement Pads
