Simpson 3/8" x 12-1/4" 2-Cutter Head SDS-Plus Drill Bit with Carbide Tip is a premium, professional-grade rotary hammer drill bit engineered for precise, high-speed drilling in concrete, masonry, and similar hard materials. Manufactured in Germany to exacting industry standards for Simpson Strong-Tie, this hardened steel bit delivers reliable performance in demanding jobsite conditions. With a 3/8" diameter, a 10" drilling depth, and a 12-1/4" overall length, it gives contractors and tradespeople the reach and accuracy needed for anchor installation and other critical fastening applications. The SDS-Plus shank design provides secure, tool-free bit changes and efficient hammer energy transfer, reducing operator fatigue and improving drilling productivity.

Key Features

• Carbide-tipped 2-Cutter Head - the dual-cutter carbide tip bites through concrete and masonry aggressively, extending bit life while maintaining clean, accurate hole geometry for reliable anchor seating.
• SDS-Plus Shank - the universal SDS-Plus connection locks securely into compatible rotary hammers, enables fast tool-free bit swaps, and maximizes hammer energy transfer for faster material penetration.
• 3/8" Diameter - a precise 3/8" bore diameter meets tight tolerance requirements for anchor bolt and fastener installations where hole size accuracy directly affects load performance.
• 10" Drilling Depth - a 10" usable drilling depth allows placement of longer anchors and deeper embedments without needing an extension, handling a wide range of structural fastening depths in a single pass.
• Hardened Steel Body - the hardened steel shank and flute construction resists bending and wear under rotary hammer impact loads, contributing to consistent performance over extended service life.
• Manufactured in Germany to Highest Industry Standards - precision German manufacturing ensures dimensional accuracy and proprietary features that enhance durability, drilling speed, and ease of use on professional jobsites.

Why This Product

• Designed to meet precise tolerance requirements, this bit helps ensure anchor holes are drilled to the exact diameter and depth needed for code-compliant fastener installations in concrete and masonry.
• The 2-Cutter carbide tip combined with a hardened steel body means the bit maintains its cutting geometry longer, reducing the need for frequent replacements on high-volume drilling tasks.
• The SDS-Plus shank is compatible with all current and older SDS-Plus rotary hammers, making this a versatile tool that integrates into the equipment you already own without adapters or modifications.
• Backed by Simpson Strong-Tie's complete line of premium drill bits and anchoring solutions, this bit is purpose-matched for use with Simpson anchor systems, simplifying procurement for consistent, tested results.

Specifications

• Brand: Simpson Strong-Tie
• Diameter: 3/8 in.
• Drilling Depth: 10 in.
• Overall Length: 12-1/4 in.
• Head Type: 2-Cutter Head
• Shank Type: SDS-Plus Shank
• Material: Hardened Steel
• Country of Origin: Germany

Available Pack Options

• MDPL03712: 1 Ea
• MDPL03712-R25: 25 Pk

Frequently Asked Questions

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

This bit features a standard SDS-Plus shank, which is compatible with all current and older SDS-Plus rotary hammers from major brands including AEG, Black & Decker, Bosch, DeWalt, Hitachi, Hilti, Kango, Makita, Metabo, Milwaukee, Porter Cable, Ramset, Red Head, Ryobi, and Skil - providing broad compatibility with equipment already on most jobsites.

What is the usable drilling depth of this bit, and how does the overall length relate to that?

This bit provides a 10" drilling depth, which is the usable depth you can achieve in the material. The overall length of the bit is 12-1/4", with the additional length accounting for the shank insertion into the rotary hammer chuck.

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

The carbide tip is significantly harder than standard steel, allowing it to cut through tough materials like concrete and masonry efficiently. It also maintains its cutting edge longer than softer tip materials, helping the bit sustain drilling speed and hole accuracy over many uses.

What does the 2-Cutter Head design mean for drilling performance?

The 2-Cutter Head configuration uses two carbide cutting edges that work together to break up material and clear debris as the bit rotates under hammer action. This design contributes to faster penetration rates and more consistent hole diameter compared to single-cutter alternatives, which is especially important when drilling to precise tolerances for anchor installation.

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