The MK Diamond MK-290 1-3/8" Premium Grade Turbo Rim Tile Bit is built for tile setters and remodelers who need clean, chip-free holes through ceramic tile and marble for plumbing lines, electrical boxes, and fixture mounts.
Built for clean holes in finished tile
Drilling through finished tile risks cracking or chipping the glaze if the bit wanders or bites too aggressively. The MK-290's replaceable pilot drill keeps the bit centered on smooth, glazed surfaces, and its turbo-style rim (used on sizes up to 2-1/4 inch) gives controlled cutting action rather than an aggressive continuous-rim bite. Typical uses include:
- Drilling plumbing and supply-line holes through installed ceramic tile
- Cutting clearance holes for electrical boxes and fixture mounts on tile walls
- Drilling marble and natural stone surfaces without chipping the finish
- Remodeling and repair work where a hole must be cut in tile that is already installed
Specifications
- Diameter: 1-3/8 inch
- Grade: Premium
- Shank: 10mm
- Rim style: Turbo rim (used on MK-290 sizes up to 2-1/4 inch)
- Use: Wet or dry
- Includes a replaceable pilot drill to prevent wandering when starting the hole
Frequently asked questions
What materials does the MK-290 1-3/8" bit drill?
Ceramic tile and marble. MK Diamond builds the MK-290 line specifically to drill clean, smooth holes through these materials without cracking or chipping the surrounding surface.
Can I use this bit wet or dry?
Both. The MK-290 is rated for wet or dry use, though wet use (with a small amount of water at the hole) keeps dust down and helps the bit run cooler on harder tile and stone.
What tool does the 1-3/8 inch bit fit?
Any drill with a 10mm shank, which is the standard shank size across the entire MK-290 line.
Why does it have a turbo rim instead of a smooth rim?
MK Diamond uses a turbo-style rim on MK-290 sizes up to 2-1/4 inch, including this 1-3/8 inch bit, for faster, more controlled cutting action when starting and drilling the hole. Larger bits above 2-1/4 inch switch to a continuous rim.
What is the pilot drill for and can it be replaced?
The pilot drill centers the bit so it doesn't wander when starting a hole on a smooth or glazed tile surface. It's a separate wear part (MK part # 151375-149) that can be replaced on its own instead of buying a new bit.
Discount Cleaning Products is an authorized MK Diamond dealer with US-based customer service for help choosing the right blade or bit for your job.
