Gundlach Diamond Core Bit 4" (100 mm)

This Montolit Diamond Core Bit is made in Italy with high quality diamond construction ensuring the Bit will quickly dry drill many holes (40 - 60) in the hardest porcelain, ceramic and natural stone (granite, marble, slate and limestone) tile. Bit is designed to mount to a standard angle grinder 5/8" / 11 standard thread without the use of an adapter (recommended 11,000 rpm). Average drill time of 20 seconds per hole!