The Simpson 7/8 in. x 13 in. SDS-Max Quad-Head Carbide Drill Bit is engineered for demanding rotary hammer applications in concrete, masonry, and reinforced concrete. Built around a quad-head dual-cutter design with a high-volume, double-helix flute geometry, this bit optimizes impact energy transfer from the rotary hammer into the drill bit tip to deliver faster drilling speeds, reduced vibration, and longer service life - making it a dependable choice for professional concrete drilling and structural anchor hole work.

Key Features

• Uniformly Brazed Carbide Inserts - Precision brazing ensures consistent carbide bonding across the drill bit tip, resulting in longer bit life and reliable performance through extended, high-impact use.
• Self-Centering Tips - Accurate hole placement from the first strike reduces the need for repositioning, keeping anchor hole drilling precise and productive.
• Chromium-Nickel-Molybdenum Steel Alloy Body - This high-grade steel alloy construction ensures superior hammering quality and an extended service life under heavy-duty rotary hammer conditions.
• Heat-Treatment and Shot-Peened Finish - Proprietary heat-treatment procedures combined with a shot-peened finish increase surface hardness, boost drilling speed, reduce drill bit wear, and improve resistance to bending forces.
• 4 x 90 deg. Quad-Head Geometry - This head design crushes through rebar and prevents sticking in reinforced concrete, keeping the bit moving efficiently through the toughest substrates.
• High-Volume, Multi-Flute Spiral - The patented, reinforced core flute geometry quickly channels concrete dust out of the hole to maximize energy transfer, improve drilling speed, and maintain a clean bore.
• ANSI Standard B212.15 Compliant - Conformance to ANSI Standard B212.15 ensures the bit meets precise industry dimensional and performance standards, supporting consistent results across professional applications.
• Proprietary Flute Geometry - Reduces vibration and optimizes impact energy transfer from the rotary hammer into the drill bit tip, lowering noise, stress, and physical fatigue on the operator during prolonged use.

Why This Product

• Built to Handle Reinforced Concrete - The 4 x 90 deg. quad-head design is specifically engineered to crush through rebar and prevent sticking, making this bit a practical solution for drilling anchor holes in rebar-heavy structural concrete rather than just standard masonry.
• Faster Drilling with Less Operator Fatigue - The proprietary double-helix flute geometry and reinforced core work together to optimize energy transfer, clear dust quickly, and reduce vibration - translating to quicker hole completion and less physical strain during high-volume drilling tasks.
• Premium Materials for Long-Term Durability - Uniformly brazed carbide inserts, a chromium-nickel-molybdenum steel alloy body, and a heat-treated, shot-peened finish combine to extend service life and resist wear and bending forces even under sustained heavy use.
• Precision You Can Count On - Self-centering tips and ANSI Standard B212.15 compliance work together to deliver accurate, consistent hole placement - critical for anchor installations and structural applications where exact positioning directly affects load performance.

Specifications

• Model Number (MPN): MDMX08713Q
• Brand: Simpson Strong-Tie
• Shank Type: SDS-max Shank
• Head Type: Quad Head / 4x Drill Bit
• Diameter: 7/8 in.
• Overall Length: 13 in.
• Drilling Depth: 8 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Steel Alloy)
• Tip Material: Carbide
• ANSI Standard: B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into concrete, including reinforced concrete containing rebar
• Masonry and concrete demolition applications requiring high-impact SDS-max rotary hammer tooling
• Precision anchor hole drilling where accurate hole placement and consistent diameter are critical
• High-volume drilling tasks where dust clearance, speed, and operator comfort are priorities
• Professional construction and structural applications requiring ANSI Standard B212.15 compliant drill bits