One of our most popular!
High-Quality aggressive bit with vacuum brazed diamond sides, convenient dry application designed for on-site use, very fast cutting when drilling faucet-mounting holes in the hardest 1-1/4" thick counter top and vanity materials:
5/8"-11 thread, works with most high-speed angle grinders
*Dry Bits work differently than wet bits in that the high RPM speed cools the bit during use. Spin at 7,000 RPM for larger and 11,000 RPM for smaller diameters.