Diablo Stop Bit DMAST1040 5/8 Inch SDS Plus Carbide 2 Cutter (1-3/16 Inch Depth Collar Concrete Masonry Drop In Anchor Drilling Tool)

Diablo DMAST1040 5/8-Inch SDS-Plus 2-Cutter Carbide-Tipped Stop Bit

The Diablo DMAST1040 5/8-Inch SDS-Plus 2-Cutter Stop Bit provides precise, repeatable depth control for setting concrete drop-in anchors, mechanical expansion shields, and post-installed rebar dowels. Engineered with an integrated steel stop collar, this hammer bit automatically limits hole depth to 1-3/16 inches (1.1875 in) to prevent over-drilling and eliminate post-tension cable damage. Premium Diablo-formulated carbide tips and an optimized high-temperature brazing process withstand severe percussion and thermal friction across corded and cordless SDS-Plus rotary hammers.

Best Used For:

• Concrete Drop-In Anchor Installation: Boring uniform 5/8-inch diameter holes precisely 1-3/16 inches deep for overhead electrical conduit racks and HVAC duct trapeze hangers.
• Post-Tension Slab Fastening: Drilling anchor points in pre-stressed concrete decks without exceeding maximum allowable penetration depths near tensioning tendons.
• Commercial Pipe Trapeze Mounting: Rapidly drilling consistent anchor cavities in cured concrete ceilings and masonry block walls for mechanical pipe support brackets.

Key Performance & Safety Features

• Integrated Solid Stop Collar: Provides a rigid physical barrier at exactly 1-3/16-inch depth to guarantee uniform embedment for shallow anchors.
• Diablo Premium Carbide: High-density carbide cutting head withstands severe percussive impact and abrasive aggregate resistance.
• High-Temperature Tri-Metal Brazing: Advanced thermal bonding prevents carbide tip loss during continuous high-load rotary hammer operations.
• 2-Cutter Tip Configuration: Balances rapid penetration rates with smooth, concentric hole sizing in cured structural concrete.
• Standard SDS-Plus Drive Shank: Optimized to deliver direct kinetic energy transfer from all standard SDS-Plus rotary hammer chucks.

What's Included

• (1) Diablo DMAST1040 5/8-Inch SDS-Plus 2-Cutter Carbide-Tipped Stop Bit (1-3/16-Inch Drilling Depth)

Technical Specifications

Pro-Tip: Once the steel stop collar makes flat contact with the concrete surface, pull the rotating bit in and out twice without adding forward force to clear residual masonry dust, ensuring the 5/8-inch drop-in anchor sets to full embedment depth.