Diablo Tile Drill Bit DMANS1040 5/16 Inch Stone Glass (Multi Ground Carbide Tip 3 Flat Shank Rotary Driver Ceramic Granite Precision Boring Tool)

Diablo DMANS1040 5/16-Inch x 2-1/4-Inch Carbide-Tipped Tile, Stone, and Glass Drill Bit

The Diablo DMANS1040 5/16-Inch x 2-1/4-Inch Carbide-Tipped Drill Bit bores clean, chip-free mounting holes through delicate ceramic tile, natural stone backsplashes, granite slabs, and non-tempered glass panels. Engineered with a specialized brazing and hardening process, this multi-ground carbide spearhead delivers aggressive, self-centering starts that eliminate bit wandering across slick, polished, or glazed surfaces. Featuring a 3-flat shank to eliminate bit slippage inside standard 3-jaw drill chucks and optimized for rotary-only drill drivers, this precision hole starter equips tile setters, plumbers, and commercial glaziers with rapid, crack-free anchor boring.

Best Used For:

• Bathroom Hardware & Plumbing Anchor Boring: Drilling 5/16-inch anchor clearance holes through glazed ceramic wall tiles to mount towel bars, grab handles, and shower doors without cracking.
• Granite & Natural Stone Backsplash Installations: Boring clean, splinter-free holes in dense natural stone, slate, and marble countertops for electrical and fixture mounts.
• Architectural Glass & Mirror Fastening: Penetrating flat architectural glass and decorative mirror panels smoothly with steady, low-RPM rotary action.

Key Performance & Safety Features

• Multi-Ground Carbide Tip Design: Precision-sharpened cutting geometry bites into hard, smooth surfaces on contact to provide fast, self-centering starts without walking.
• Proprietary Brazing & Hardening Process: Thermal-resistant tip bonding withstands extreme friction heat to extend tool life during deep stone penetrations.
• 3-Flat Non-Slip Shank: Machined flats lock firmly into 3-jaw drill chucks to eliminate spinning and power loss under high drilling resistance.
• Rotary Driver Optimization: Engineered specifically for standard rotary cordless and corded drill drivers, protecting brittle materials from destructive percussion impact.
• Compact 2-1/4-Inch Profile: Short overall length minimizes bit deflection and vibration for superior dimensional accuracy.

What's Included

• (1) Diablo 5/16" x 2-1/4" Tile, Stone, and Glass Carbide-Tipped Drill Bit (DMANS1040)

Technical Specifications

Pro-Tip: Always operate your drill at low rotational speeds (between 400 and 800 RPM) and apply a small trickle of water while boring tile, stone, or glass; active water cooling preserves the brazed carbide tip and prevents thermal stress fractures in the workpiece.