The Simpson 9/16 in. x 18 in. SDS-Plus Carbide 2-Cutter Head Drill Bit is a professional-grade rotohammer bit engineered for demanding concrete and masonry drilling applications. Built to precise tolerance requirements with a chromium-nickel-molybdenum steel alloy body and uniformly brazed carbide tip, this bit is purpose-built for contractors and tradespeople who require reliable, high-speed hole drilling with consistent results across heavy-use jobsite conditions.

Key Features

• Uniformly brazed carbide inserts - secure, consistent tip attachment extends bit life and maintains cutting performance through repeated use in hard materials
• Chromium-nickel-molybdenum steel alloy body - this specialized alloy composition ensures the shank and flute withstand the repeated hammering forces of rotohammer drilling without premature fatigue
• Heat-treatment procedures and shot-peened finish - increase surface hardness and drilling speed, reduce drill bit wear, and improve resistance to bending forces, keeping the bit accurate and durable under sustained load
• Chisel-shaped drill-bit head - penetrates the material and directs concrete dust into the multi-flute spiral, reducing resistance and keeping the cutting edge clear
• High-volume, multi-flute spiral - quickly channels concrete dust from the hole to improve drilling speed and reduce the need to withdraw the bit during deep passes
• 2-cutter head design - provides efficient material penetration and balanced cutting action for cleaner, faster holes in concrete and masonry
• Conforms to ANSI Standard B212.15 - meets established dimensional and performance standards, ensuring compatibility and predictable hole tolerances for anchor and fastener applications
• SDS-plus shank - locks securely into any SDS-plus compatible rotohammer for tool-free bit changes and positive energy transfer from the tool to the cutting tip

Why This Product

• Premium materials with a professional pedigree - the combination of a carbide-tipped 2-cutter head, chromium-nickel-molybdenum alloy body, and heat-treated, shot-peened finish reflects Simpson's commitment to tools built for professional contractors, not occasional use
• Engineered for speed without sacrificing bit life - the chisel-shaped head, high-volume multi-flute spiral, and uniformly brazed carbide inserts work together to move material out of the hole faster while preserving cutting-edge integrity over a longer service life
• Reliable dimensional compliance for anchoring work - conformance to ANSI Standard B212.15 means holes drilled with this bit meet the precise tolerances required for anchors, fasteners, and other post-installed concrete connections
• 16 in. drilling depth in an 18 in. overall length - the proportioning leaves enough shank engaged in the chuck at full depth, making this bit well-suited for deep anchor holes and through-slab applications where reach matters

Specifications

• Model Number (MPN): MDPL05618
• Shank Type: SDS-plus Shank
• Head Type: 2-Cutter Head
• Diameter: 9/16 in.
• Overall Length: 18 in.
• Drilling Depth: 16 in.
• Material: Hardened Steel
• Tip Material: Carbide
• Compliance Standard: ANSI Standard B212.15
• Country of Origin: Germany

Approved Applications

• Drilling into concrete, masonry, and similar hard materials requiring a carbide-tipped SDS-plus bit
• Professional and contractor-grade drilling applications demanding precise hole tolerances
• Applications requiring efficient concrete dust removal during drilling via multi-flute spiral channeling
• Use with SDS-plus rotohammers requiring a 9/16 in. diameter bit with up to 16 in. drilling depth
• Any drilling or demolition task where extended bit life and superior surface hardness are critical

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

Frequently Asked Questions

What type of rotohammer is this drill bit compatible with?

This drill bit features an SDS-plus shank, which allows for secure, tool-free bit changes in any SDS-plus compatible rotohammer. It is not compatible with SDS-max or standard round-shank rotary drills.

What is the maximum drilling depth this bit can achieve?

The Simpson MDPL05618 has a drilling depth of 16 in. and an overall length of 18 in., giving the user clearance for the shank to remain engaged in the tool chuck while reaching the full drilling depth.

What materials is this drill bit designed to drill into?

This bit is designed for drilling into concrete, masonry, and similar hard materials. Its carbide-tipped, chisel-shaped 2-cutter head penetrates hard material efficiently, while the high-volume multi-flute spiral channels concrete dust out of the hole to maintain drilling speed.

What construction and quality standards does this drill bit meet?

The Simpson MDPL05618 conforms to ANSI Standard B212.15. It is made from a chromium-nickel-molybdenum steel alloy body with uniformly brazed carbide inserts, and undergoes heat-treatment procedures and a shot-peened finish to increase surface hardness, extend service life, and improve resistance to bending forces.