Relton (HST - 20) Tub, Tile and Spa Cutter 1 - 1 - 4" Brazed - Carbide Hole Saw Drill Bit - Isopure Water - HST - 20
Relton

Relton (HST-20) Tub, Tile and Spa Cutter 1-1-4" Brazed-Carbide Hole Saw Drill Bit

Product Code HST-20

$182.70
The Relton HST-20 is a 1-1/4" brazed-carbide hole saw engineered for precision drilling through ceramic tile, marble, granite, Corian, and fiberglass in wet applications including tubs, spas, and shower installations. This professional-grade bit features a carbide-tipped pilot and delivers a standard 2" drilling depth for clean, accurate cuts in the hardest materials.
SPECIFICATIONS

Relton HST-20 Core Specs

Diameter
1-1/4"
Standard bore size
Drilling Depth
2"
Standard cut depth
Cutting Edge
Brazed Carbide
Industrial grade
Pilot Type
Carbide Tipped
Included with bit
Model Number
HST-20
Relton OEM
Application
Wet Drilling
Tile, tub, spa use
TECHNICAL DETAILS

What's Included & Material Compatibility

Package Contents Hole saw cutter-head, shank, carbide-tipped pilot
Ceramic Tile Compatible – standard tile installations
Natural Stone Cuts marble and granite surfaces
Solid Surface Corian and similar composite materials
Fiberglass & Gelcoat Tubs, spas, shower pans, marine applications
Recommended Use Wet drilling with constant water flow
Typical Applications Faucet holes, shower valve penetrations, spa jet openings
COMPATIBILITY & APPLICATIONS

Where This Bit Excels

The Relton HST-20 is built for plumbers, tile installers, and contractors who need reliable performance drilling through hard, brittle materials in bathroom and spa environments. The 1-1/4" diameter is ideal for standard valve penetrations, small faucet installations, and spa jet fittings. Brazed-carbide construction means the cutting edge stays sharp through repeated use in abrasive materials like granite and ceramic. Always use water as a lubricant and coolant during drilling to extend bit life and prevent material cracking. Compatible with standard drill chucks and right-angle drills rated for masonry bits.

💧 Run a steady stream of water over the cutting area during use. This keeps the carbide cool, clears debris from the cut, and dramatically reduces the risk of cracking tile or gelcoat.