Simpson 5/16" x 6-1/4" 2-Cutter Head SDS-Plus Carbide Drill Bit is a premium, professional-grade rotary hammer bit engineered to deliver fast, precise drilling in concrete, masonry, and other hard materials. Built to exact tolerance requirements with a hardened steel body and carbide tip, this SDS-Plus bit is a reliable choice for contractors and tradespeople who need consistent performance and extended tool life on demanding jobsites.

Key Features

• Carbide-Tipped 2-Cutter Head - the dual-cutter carbide tip penetrates concrete and masonry efficiently, reducing drilling time and operator fatigue compared to standard steel bits.
• SDS-Plus Shank - the SDS-Plus interface locks securely into compatible rotary hammer chucks, allowing quick, tool-free bit changes while maintaining positive drive engagement during heavy-duty drilling.
• 5/16" Diameter - sized precisely for anchor and fastener hole requirements common in structural and general construction applications, minimizing the need for oversizing or redrilling.
• 4" Drilling Depth Capacity - provides sufficient embedment depth for a wide range of anchor installations without requiring extension accessories on most applications.
• 6-1/4" Overall Length - the extended body gives clearance when drilling near walls, flanges, or obstructions, expanding the range of positions where the bit can be used effectively.
• Hardened Steel Body - the robust steel construction resists flexing and breakage under the rotational and impact forces generated by SDS-Plus rotary hammers.
• Manufactured in Germany to Highest Industry Standards - produced under rigorous quality controls with proprietary features that enhance durability and drilling speed, delivering professional-grade consistency on every hole.

Why This Product

• Precision-Engineered Tolerances - this bit is designed to meet precise tolerance requirements, meaning holes are drilled to exact dimensions, which is critical for proper anchor seating and structural integrity.
• Broad Rotary Hammer Compatibility - the SDS-Plus shank fits all current and older SDS-Plus rotohammers from AEG, Black and Decker, Bosch, DeWalt, Hitachi, Hilti, Kango, Makita, Metabo, Milwaukee, Porter Cable, Ramset, Red Head, Ryobi, and Skil, eliminating the need to source brand-specific bits.
• Designed for Simpson Strong-Tie Applications - engineered as part of a complete Simpson Strong-Tie drilling and fastening system, this bit pairs naturally with Simpson anchors and fasteners to help ensure code-compliant installations.
• Professional Grade, Field-Ready Durability - proprietary carbide tip features enhance both drilling speed and tool longevity, reducing bit replacement frequency on high-volume drilling tasks.

Specifications

• Brand: Simpson Strong-Tie
• Shank Type: SDS-Plus Shank
• Head Type: 2-Cutter Head
• Diameter: 5/16 in.
• Drilling Depth: 4 in.
• Length: 6 1/4 in.
• Material: Hardened Steel
• Country of Origin: Germany

Available Pack Options

• MDPL03106: 1 Ea
• MDPL03106-R25: 25 Pk

Frequently Asked Questions

What rotary hammers is this SDS-Plus drill bit compatible with?

This bit features an SDS-Plus shank that fits all current and older SDS-Plus rotohammers from AEG, Black and Decker, Bosch, DeWalt, Hitachi, Hilti, Kango, Makita, Metabo, Milwaukee, Porter Cable, Ramset, Red Head, Ryobi, and Skil. The SDS-Plus interface allows for tool-free bit changes and secure chuck engagement during operation.

What is the difference between the 2-Cutter Head and other head configurations?

The 2-Cutter Head features two carbide cutting edges that penetrate hard materials such as concrete and masonry with efficiency and speed. Simpson Strong-Tie also offers Regular and Quad Head tip configurations in their drill bit lineup, each suited to different drilling scenarios and material requirements.

How deep can this bit drill, and what does that mean for anchor installations?

This bit provides a 4" drilling depth, which accommodates embedment requirements for a wide range of concrete and masonry anchor applications. The 6-1/4" overall length also provides additional clearance when working in confined or obstructed areas.

Why is carbide used for the tip on this drill bit?

Carbide is significantly harder than standard steel and resists the abrasive wear caused by drilling into concrete, block, and masonry. The carbide tip on this bit incorporates proprietary features that enhance both drilling speed and durability, extending the useful life of the bit compared to non-carbide alternatives.

Note: Product dimensions may differ from picture. Please see the item description above for specifications.