• Highlight: MK Diamond MK-290 turbo-rim 1-5/8" tile bit drills clean holes through porcelain, ceramic, and natural stone.
• Best For: Tile installers drilling for towel bars, soap dishes, grab bars; counter installers boring fixture and faucet holes.
• Expert Note: Premium turbo rim cuts faster than continuous-rim bits and tolerates dry-start drilling for shallow penetrations on glazed surfaces.