Diablo Stop Bit DMAST1030 1/2 Inch x 1-11/16 Inch Depth (SDS Plus Carbide Tipped Collar Shallow Concrete Drop In Anchor Drilling)

Diablo DMAST1030 SDS-Plus 1/2-Inch x 1-11/16-Inch Depth Stop Bit

The Diablo DMAST1030 SDS-Plus 1/2-Inch x 1-11/16-Inch Depth Stop Bit is a carbide-tipped rotary hammer bit engineered for precise shallow anchor hole drilling in concrete, masonry, and cinder block. Featuring an integrated solid steel stop collar preset to a 1-11/16-inch working length, this 1/2-inch diameter bit attaches to all corded or cordless SDS-Plus rotary hammer drills. Manufactured with a 2-cutter carbide head and heat-resistant brazing, this depth-control bit solves over-drilling, anchor slipping, and rebar strike damage challenges across commercial mechanical overhead installations.

Best Used For:

• Drop-In Concrete Anchor Drilling: Boring 1/2-inch diameter pilot holes to exact 1-11/16-inch depths for setting 3/8-inch concrete drop-in anchors.
• Overhead Trapeze & Strut Mounting: Drilling uniform ceiling anchor holes for unistrut hangers, electrical conduits, and pipe support systems.
• Repeated Production Masonry Anchoring: Executing high-speed drilling across floor slabs and tilt-up concrete panels without manual tape depth marking.

Key Performance & Safety Features

• Integrated Steel Stop Collar: Fixed mechanical shoulder prevents over-penetration beyond 1-11/16 inches to ensure flush drop-in anchor fitment.
• Heat-Treated Carbide Tip Geometry: Proprietary carbide formulation withstands severe impact shock and high thermal loads generated during deep rotary hammering.
• High-Speed Dust Evacuation Flutes: Optimized spiral flute geometry clears concrete dust rapidly to prevent bit binding and reduce friction.
• 2-Cutter Head Configuration: Delivers smooth pilot hole entry and consistent hole roundness for code-compliant anchor holding strength.
• Universal SDS-Plus Shank Interface: Locks securely into all SDS-Plus rotary hammer chucks for maximum torque transfer and zero shank slippage.

What's Included

• (1) Diablo DMAST1030 1/2 in. x 1-11/16 in. Depth SDS-Plus Stop Bit with Integrated Collar

Technical Specifications

Pro-Tip: Blow out residual concrete dust from the drilled hole using a blow-out bulb before inserting the drop-in anchor to ensure the anchor sets completely flush with the concrete surface.