The Simpson 1-1/8 in. x 18 in. SDS-Plus Quad Head Carbide Drill Bit is a professional-grade rotary hammer bit engineered for demanding concrete and masonry drilling applications. Built to precise tolerances from a chromium-nickel-molybdenum steel alloy body and finished with uniformly brazed carbide inserts, this bit delivers consistent cutting performance through standard concrete, reinforced slabs, and rebar-bearing structures. The SDS-Plus shank ensures broad compatibility with current and older SDS-Plus rotary hammers, making it a reliable choice for contractors and tradespeople who need a long-reach bit capable of a 16 in. drilling depth without sacrificing speed or durability.

Key Features

• Uniformly Brazed Carbide Inserts - Even, consistent brazing across all carbide inserts extends bit life and maintains reliable cutting performance from the first hole to the last.
• Centering Tip - Facilitates easy spot drilling so the bit seats accurately on the first strike, reducing walk and improving hole placement precision.
• Chromium-Nickel-Molybdenum Steel Alloy Body - This premium steel alloy formulation is specifically chosen to handle the repeated impact forces of rotary hammer use, supporting extended service life under heavy-duty conditions.
• Heat-Treatment and Shot-Peened Finish - Combined surface hardening processes increase drilling speed, reduce bit wear, and improve resistance to bending forces, keeping the bit performing consistently over time.
• 4 x 90 deg. Quad-Head Geometry - The four-cutter head crushes through rebar and prevents the bit from sticking in reinforced concrete, allowing drilling to continue without interruption or repositioning.
• High-Volume, Multi-Flute Spiral - Rapidly channels concrete dust out of the hole during drilling, reducing clogging and helping maintain faster drilling speeds throughout the application.
• ANSI Standard B212.15 Compliance - Conformance to this industry standard ensures consistent dimensional accuracy and quality, giving professionals confidence in fit and performance across compatible SDS-Plus tools.

Why This Product

• Built for Reinforced Concrete - The 4 x 90 deg. Quad-Head tip geometry is specifically designed to crush through rebar rather than deflect or bind, making this bit a practical solution for drilling into reinforced slabs and walls where standard bits commonly stall or stick.
• Long-Reach Drilling Without Compromise - An 18 in. overall length with a 16 in. drilling depth gives contractors access to deep anchoring applications while the premium steel alloy body and heat-treated finish maintain structural integrity under sustained hammering.
• Premium Materials and Manufacturing Standards - The chromium-nickel-molybdenum alloy body, uniformly brazed carbide inserts, and ANSI B212.15 compliance reflect a professional-grade standard of construction that supports consistent results across high-volume drilling jobs.
• Fast Dust Evacuation for Sustained Speed - The high-volume, multi-flute spiral design actively clears concrete dust from the bore during drilling, reducing heat buildup and friction so the bit maintains cutting speed rather than slowing as debris accumulates.

Specifications

• Specification: Detail
• Model Number (MPN): MDPL11218Q
• Diameter: 1-1/8 in.
• Overall Length: 18 in.
• Drilling Depth: 16 in.
• Shank Type: SDS-Plus Shank
• Head Type: Quad Head 4x Drill Bit
• Tip Material: Carbide
• Body Material: Chromium-Nickel-Molybdenum Hardened Steel Alloy
• Finish: Shot-Peened, Heat-Treated
• Standard Compliance: ANSI Standard B212.15
• Country of Origin: Germany

Approved Applications

• Rotary hammer drilling into concrete and masonry
• Drilling through reinforced concrete containing rebar
• Spot drilling requiring precise centering accuracy
• High-volume drilling applications requiring fast dust evacuation
• Professional and contractor-grade concrete drilling requiring ANSI B212.15-compliant tooling

This bit is designed for use with SDS-Plus rotary hammers.