Diablo Hammer Drill Bit DMARG1140 7/16 Inch Diameter SPEEDemon (Carbide Tip 4 Inch Depth 6 Inch Length Hex Shank Concrete Granite Hole Boring)

Diablo DMARG1140 7/16-Inch x 4-Inch x 6-Inch SPEEDemon Red Granite Carbide Hammer Drill Bit

The Diablo DMARG1140 7/16-Inch x 4-Inch x 6-Inch SPEEDemon Red Granite Carbide-Tipped Hammer Drill Bit features high-density tungsten carbide cutting geometry and a self-centering Grip Point Tip PLUS point to drill accurate, wandering-free anchor holes through hard masonry surfaces. Engineered with an aggressive multi-ground head and an optimized U-flute profile, this impact-rated boring accessory evacuates abrasive dust rapidly to minimize thermal breakdown and extend cutter life up to 4X longer than standard masonry bits. Built with an Impact Strong hex shank that eliminates spinout in standard 3-jaw hammer drill chucks and 1/4-inch hex impact drivers, it equips electrical contractors, masonry specialists, and commercial installers with high-speed penetration across cured concrete, structural brick, natural granite, and architectural stone.

Best Used For:

• Medium-Duty Concrete Anchor Placement: Boring 7/16-inch diameter holes up to 4 inches deep for heavy-duty sleeve anchors, concrete wedge anchors, and pipe hanging brackets in solid foundation walls.
• Granite & Natural Stone Cladding Installation: Penetrating dense red granite, marble tiles, and natural stone facades without bit wandering or surface glaze blowout.
• Electrical & Plumbing Fixture Fastening: Creating clean, straight holes through poured concrete, CMU masonry blocks, and brick structures for mounting electrical panels and plumbing standoffs.

Key Performance & Safety Features

• Diablo Premium Carbide Tip: High-performance brazing and hardening process withstands extreme percussion impact and friction heat, extending bit life up to 4X.
• Grip Point Tip PLUS Geometry: Multi-ground self-centering point ensures immediate engagement on smooth stone and dense concrete without skating.
• Optimized U-Flute Dust Removal: Wide spiral flutes eject hot masonry debris rapidly away from the cutting zone, keeping the tip cooler during continuous deep drilling.
• Impact Strong Hex Shank: Heavy-duty shank design prevents bit spinning in keyed or keyless drill chucks and provides seamless compatibility with cordless impact drivers.
• Multi-Mode Tool Compatibility: Engineered for maximum performance in both rotary-hammer percussive mode and standard rotary-only drilling tools.

What's Included

• (1) Diablo 7/16" x 4" x 6" SPEEDemon Red Granite Carbide-Tipped Hammer Drill Bit (DMARG1140)

Technical Specifications

Pro-Tip: When boring into dense red granite or smooth marble facades, start drilling in rotary mode at low RPM until the Grip Point Tip PLUS creates a clean starter divot, then engage hammer mode to accelerate penetration without chipping the finished stone edges.