• Highlight: MK Diamond MK-290 1-3/8" premium turbo-rim diamond core bit for clean entry holes in tile and stone.
• Best For: Tile installers, plumbers, and remodelers drilling clean holes for faucet bodies, valves, and shower fittings.
• Expert Note: Turbo-rim segments cool quickly with a wet feed; 5/8"-11 thread fits standard right-angle grinders and core drills.