Simpson 1/4" x 8-1/4" 2-Cutter Head SDS-Plus Drill Bit with Carbide Tip is a premium, professional-grade rotary hammer drill bit engineered to deliver precise, fast drilling in concrete, masonry, and other hard materials. Built to exact tolerance requirements and featuring a hardened steel body with a carbide-tipped 2-cutter head, this SDS-Plus bit is designed for demanding jobsite applications where accuracy and durability cannot be compromised. Manufactured in Germany to the highest industry standards, it offers the consistent performance that contractors and tradespeople rely on for anchoring, fastening, and demolition prep work.

Key Features

• Carbide-Tipped 2-Cutter Head - delivers aggressive material removal and precise hole geometry, reducing drilling time while maintaining accurate bore diameter in concrete and masonry
• SDS-Plus Shank - fits all SDS-Plus rotary hammers with a secure, tool-free bit engagement, allowing fast bit changes on the job without sacrificing holding strength or energy transfer
• 1/4" Diameter with 6" Drilling Depth - sized for anchor and fastener installation applications where consistent hole depth is critical for proper load performance
• 8-1/4" Overall Length - provides extended reach for drilling through thick materials or in tight access situations where shorter bits cannot reach
• Hardened Steel Body - resists flex and wear under the rotary hammer's impact force, maintaining straightness and prolonging working life on demanding substrates
• Proprietary Features for Enhanced Durability and Drilling Speed - engineered with design elements specific to Simpson Strong-Tie's standards, so the bit holds up under repeated professional use rather than degrading after a few holes
• Manufactured in Germany to Highest Industry Standards - precision production ensures tight tolerances on every bit, meaning the hole you drill matches the specification your anchor or fastener requires

Why This Product

• Precision tolerance for anchor performance - the bit is designed to meet exact diameter and depth requirements, so anchor systems and fasteners seat correctly and achieve their rated holding values without guesswork
• Professional-grade carbide tip built for repeated use - the carbide-tipped 2-cutter head is engineered for durability under sustained rotary hammer impact, making it a reliable choice for high-volume drilling rather than single-use applications
• Broad SDS-Plus rotary hammer compatibility - the SDS-Plus shank works with a wide range of current and older rotary hammer models, so you can use the bit with the tools already on your jobsite without adapters or special equipment
• Extended 8-1/4" length with 6" drilling depth - the longer overall length gives access to deeper or harder-to-reach drilling locations, while the 6" drilling depth accommodates longer anchor embedments in a single pass

Specifications

• Brand: Simpson Strong-Tie
• Diameter: 1/4 in.
• Length: 8-1/4 in.
• Drilling Depth: 6 in.
• Head Type: 2-Cutter Head
• Shank Type: SDS-Plus Shank
• Material: Hardened Steel
• Country of Origin: Germany

Available Pack Options

• MDPL02508: 1 Ea
• MDPL02508-R25: 25 Pk

Frequently Asked Questions

What type of rotary hammer does this bit fit?

This bit uses an SDS-Plus shank, which is compatible with SDS-Plus rotary hammers. This includes a wide range of current and older models from major tool brands, making it versatile for most professional jobsite setups without requiring adapters.

What is the difference between the drilling depth and the overall length?

The overall length of the bit is 8-1/4 in., which is the full measurement from shank end to tip. The drilling depth is 6 in., which is the maximum depth the bit can effectively drill into a substrate during normal operation. The difference accounts for the shank engagement and flute geometry of the bit.

Why is a carbide tip used on this SDS-Plus drill bit?

Carbide is significantly harder than standard steel, which allows the tip to penetrate concrete, masonry, and other hard materials without rapid wear. The carbide-tipped 2-cutter head on this bit is designed to maintain its cutting geometry over repeated use, preserving hole accuracy and drilling speed across a full day of professional work.

Is this bit suitable for use with Simpson Strong-Tie anchor systems?

This bit is engineered to meet precise tolerance requirements, which makes it well suited for drilling holes intended for anchor and fastener installations where bore diameter and depth directly affect holding performance. The 1/4 in. diameter and 6 in. drilling depth align with common anchor installation requirements in concrete and masonry applications.

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