Simpson 1/4" x 4-1/4" 2-Cutter Head SDS-Plus Carbide Drill Bit by Simpson Strong-Tie is a premium, professional-grade rotary hammer drill bit engineered for precision drilling in concrete, masonry, and similar hard materials. Manufactured in Germany to the highest industry standards, this carbide-tipped bit is built for contractors and tradespeople who demand consistent performance, tight tolerances, and long tool life on the job site. The SDS-plus shank design allows for quick, tool-free bit changes and secure chuck engagement, making it a go-to choice for anchoring, fastening, and structural drilling applications.

Key Features

• SDS-Plus shank - fits all standard SDS-plus rotary hammers for tool-free, one-handed bit changes that keep your workflow moving without interruption
• 2-cutter carbide head - delivers fast material removal and extended bit life in concrete and masonry compared to standard steel heads
• 1/4" cutting diameter - sized precisely for anchor and fastener installation requiring a 1/4" pilot hole, ensuring proper fit and holding strength
• 4-1/4" overall length with 2" drilling depth - provides the reach needed for common anchor-setting depths while keeping the bit compact and manageable in tight spaces
• Carbide-tipped construction - engineered to meet precise tolerance requirements, producing clean, accurately sized holes for reliable anchor performance
• Proprietary design features - enhance durability and drilling speed while improving ease of use, reducing operator fatigue over extended drilling sessions
• Broad rotary hammer compatibility - fits 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, so it works with equipment already on your job site

Why This Product

• Built to exacting Simpson Strong-Tie tolerances - this bit produces holes sized to work correctly with Simpson anchors and fasteners, helping ensure code-compliant installations without guesswork
• German-engineered carbide quality - the premium carbide tip resists wear during repeated drilling in hard materials, meaning fewer bit replacements and lower cost per hole over time
• Universal SDS-plus compatibility - works across a wide range of major rotary hammer brands, so there is no need to buy brand-matched tooling or change out your existing equipment
• Compact 4-1/4" format for everyday anchor work - the 2" drilling depth and manageable overall length make this bit well-suited for standard structural anchor installations where a long bit would be cumbersome

Specifications

• Brand: Simpson Strong-Tie
• Shank Type: SDS-Plus
• Head Type: 2-Cutter
• Head Diameter: 1/4 in.
• Drilling Depth: 2 in.
• Overall Length: 4-1/4 in.
• Tip Material: Carbide
• Country of Origin: Germany

Available Pack Options

• MDPL02504: 1 Ea
• MDPL02504-R25: 25 Pk

Frequently Asked Questions

What rotary hammers is this SDS-plus bit compatible with?

This bit 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. If your rotary hammer uses an SDS-plus chuck, this bit is designed to fit and lock securely.

What is the actual drilling depth this bit achieves?

This bit provides a drilling depth of 2 inches. The overall length of the bit is 4-1/4 inches, with the remaining length accounted for by the shank and flute sections. When selecting this bit, confirm that a 2-inch drilling depth meets the requirements of your anchor or fastener installation.

Why use a carbide-tipped drill bit instead of a standard steel bit for concrete and masonry?

Carbide-tipped bits are significantly harder and more wear-resistant than standard steel, allowing them to cut through concrete, block, and masonry more efficiently and maintain a precise cutting diameter over many holes. This bit is manufactured to meet precise tolerance requirements, which is important when drilling holes sized for structural anchors where hole diameter directly affects holding performance.

What does the 2-cutter head design mean for drilling performance?

A 2-cutter carbide head uses two opposing cutting edges to score and break material symmetrically as the bit rotates. This balanced cutting action helps produce clean, round holes at consistent diameters and contributes to faster material removal compared to single-cutter designs, reducing drilling time in hard substrates like concrete and masonry.

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