The Simpson 7/16 in. x 12-1/4 in. SDS-Plus Carbide 2-Cutter Head Drill Bit is a premium, professional-grade rotary hammer bit engineered for demanding concrete and masonry drilling applications. Built to precise tolerance requirements with proprietary design features, this bit delivers reliable performance whether you are anchoring into concrete, drilling through block, or tackling heavy-duty demolition prep work. Simpson brings the full depth of its fastening expertise to this carbide-tipped SDS-Plus bit, combining advanced metallurgy with purpose-built geometry to keep jobs moving efficiently and accurately.

Key Features

• Uniformly brazed carbide inserts - consistent bonding across the entire cutting tip means the bit holds its edge longer and resists premature wear, reducing replacement frequency on the job.
• Chromium-nickel-molybdenum steel alloy body - this high-grade alloy composition handles the repeated impact forces of rotary hammer drilling, maintaining structural integrity through extended service life.
• Heat-treatment procedures and shot-peened finish - these processes increase surface hardness, boost drilling speed, reduce bit wear, and improve resistance to bending forces, keeping the bit straighter and faster over time.
• Chisel-shaped drill-bit head - the geometry penetrates material aggressively and actively directs concrete dust into the multi-flute spiral, so the cutting zone stays clear and drilling stays efficient.
• High-volume, multi-flute spiral - rapidly channels concrete dust out of the hole during drilling, improving drilling speed and reducing clogging that can slow progress or damage the bit.
• 2-cutter head design - provides controlled, balanced penetration into concrete and masonry for cleaner holes with less effort from the operator.
• SDS-Plus shank - the industry-standard connection system locks securely into compatible rotary hammers without tools, allowing fast bit changes while maintaining a firm, play-free grip during operation.
• Conforms to ANSI Standard B212.15 - compliance with this recognized industry standard confirms the bit meets established dimensional and performance tolerances professionals can depend on.

Why This Product

• Built to outlast standard carbide bits - the combination of uniformly brazed carbide inserts, a chromium-nickel-molybdenum alloy body, and a heat-treated, shot-peened finish works together to extend service life well beyond what basic drill bits can offer, lowering the total cost of drilling over time.
• Self-clearing flute design keeps drilling fast - the chisel-shaped head and high-volume multi-flute spiral work as a system to move concrete dust continuously out of the hole, preventing buildup that would otherwise slow penetration and strain the tool.
• Engineered to professional tolerances - manufactured to meet precise tolerance requirements and conforming to ANSI Standard B212.15, this bit produces accurately sized holes that work correctly with anchor systems and fasteners that depend on exact fit.
• A trusted brand behind every bit - Simpson offers this drill bit as part of a complete line of drilling and demolition accessories, meaning the same engineering standards applied to their anchoring systems are carried through to the tools used to install them.

Specifications

• MPN: MDPL04312
• Brand: Simpson Strong-Tie
• Shank Type: SDS-Plus Shank
• Head Type: 2-Cutter Head
• Diameter: 7/16 in.
• Drilling Depth: 10 in.
• Overall Length: 12-1/4 in.
• Material: Hardened Steel with Carbide Tip
• Compliance: ANSI Standard B212.15
• Country of Origin: Germany

Frequently Asked Questions

What shank type does the MDPL04312 use, and which rotary hammers is it compatible with?

The MDPL04312 features an SDS-Plus shank, which is the industry-standard connection system for rotary hammer drill bits. SDS-Plus shanks are compatible with a wide range of professional rotary hammer tools from major manufacturers.

What is the maximum drilling depth this bit can achieve?

The MDPL04312 has a drilling depth of 10 in., with an overall length of 12-1/4 in., allowing for substantial reach in concrete and masonry applications.

What makes this drill bit more durable than standard carbide bits?

This bit combines uniformly brazed carbide inserts with a chromium-nickel-molybdenum steel alloy body. Additionally, heat-treatment procedures and a shot-peened finish increase surface hardness and resistance to bending forces, significantly extending service life compared to standard bits.

How does the bit manage concrete dust during drilling?

The chisel-shaped drill-bit head penetrates the material and directs concrete dust into the high-volume, multi-flute spiral, which quickly channels that dust out of the hole. This design actively improves drilling speed and helps keep the work area cleaner during operation.

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