The Simpson SDS-max Quad Head Carbide Drill Bit, 2 in. x 23 in. is a professional-grade rotary hammer bit engineered for demanding concrete and reinforced concrete drilling applications. Built on a proprietary quad-head dual-cutter design, this bit combines a high-volume, double-helix flute geometry with a patented reinforced core to maximize energy transfer from the rotary hammer into the tip, delivering faster drilling speeds, reduced operator fatigue, and extended bit life on the toughest substrates.

Key Features

• Quad-Head Dual-Cutter Design with Reinforced Core Flute - The high-volume, double-helix quad-head configuration and patented reinforced core flute maximize energy transfer from the rotary hammer into the bit tip, meaning faster penetration rates and greater durability through heavy use.
• 4 x 90 deg. Head Geometry - Specifically engineered to crush through rebar and prevent sticking in reinforced concrete, reducing downtime and keeping work moving through the most demanding structural substrates.
• Uniformly Brazed Carbide Inserts - Consistent, precise brazing across all carbide tips ensures even contact and longer bit life, lowering replacement frequency and overall cost per hole.
• Self-Centering Tips - Accurate hole placement from the first contact reduces the need for repositioning, improving productivity and hole-location precision on every application.
• Chromium-Nickel-Molybdenum Steel Alloy Body - This hardened steel alloy construction delivers superior hammering quality and an extended service life under sustained high-impact rotary hammer conditions.
• Heat-Treatment and Shot-Peened Finish - Increases surface hardness, improves resistance to bending forces, reduces bit wear, and contributes to faster drilling speeds over the life of the bit.
• High-Volume, Multi-Flute Spiral - Rapidly channels concrete dust out of the hole during drilling, keeping the cutting zone clear and maintaining consistent drilling speed without frequent bit withdrawal.
• ANSI Standard B212.15 Compliance - Confirms the bit meets established dimensional and performance standards, giving professionals confidence in fit and reliable compatibility with SDS-max rotary hammers.

Why This Product

• Built to Drill Through Rebar Without Stalling - The 4 x 90 deg. quad-head geometry is purpose-designed to crush through rebar and resist sticking in reinforced concrete, making this bit a reliable choice for structural concrete work where rebar encounters are routine.
• Engineered to Reduce Operator Strain - The proprietary flute geometry optimizes impact energy transfer and minimizes vibration, which reduces noise and physical stress on the operator during extended drilling sessions.
• Premium Materials for Long-Term Durability - The combination of uniformly brazed carbide inserts, a chromium-nickel-molybdenum steel alloy body, and a heat-treated, shot-peened finish work together to extend bit life and maintain performance across repeated high-impact use.
• Deep-Hole Capability in a Single Bit - With an 18 in. drilling depth and 23 in. overall length on an SDS-max shank, this bit handles deep anchor and fastener holes in concrete without requiring extensions or additional tooling.

Specifications

• Model Number (MPN): MDMX20023Q
• Brand: Simpson Strong-Tie
• Shank Type: SDS-max Shank
• Head Type: Quad Head - 4x Drill Bit
• Diameter: 2 in.
• Overall Length: 23 in.
• Drilling Depth: 18 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Steel Alloy)
• Tip Material: Carbide
• Finish: Shot-Peened, Heat-Treated
• Standards Compliance: ANSI Standard B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into concrete and reinforced concrete
• Penetrating rebar-reinforced concrete substrates using the 4 x 90 deg. head geometry
• High-volume drilling applications requiring rapid dust removal via multi-flute spiral design
• Professional rotary hammer drilling with SDS-max shank rotary hammers
• Applications requiring precise hole