The Simpson Strong-Tie SDS-Plus Quad Head Carbide Drill Bit 1-1/4 in. x 18 in. is a premium, professional-grade rotary hammer bit engineered to tackle the most demanding concrete and masonry drilling applications. Built to precise tolerance requirements using a chromium-nickel-molybdenum steel alloy body with uniformly brazed carbide inserts, this bit delivers the durability, drilling speed, and reliability that contractors need when anchoring into reinforced concrete or driving deep into masonry. The proprietary 4 x 90 deg. Quad Head geometry sets this bit apart, allowing it to push through rebar without binding while the high-volume, multi-flute spiral continuously clears debris from the hole. Conforming to ANSI Standard B212.15, it is manufactured to the highest industry standards for Simpson Strong-Tie.

Key Features

• Uniformly brazed carbide inserts - provide consistent bond strength across the cutting tip, resulting in longer bit life and more reliable performance over repeated use
• Centering tip design - facilitates easy spot drilling so the bit bites into the surface immediately without wandering, saving time on layout-critical applications
• Chromium-nickel-molybdenum steel alloy body - delivers the toughness and resilience needed to withstand rotary hammer impacts, ensuring hammering quality and extended service life
• Heat-treatment procedures and shot-peened finish - increase surface hardness, improve resistance to bending forces, and reduce drill bit wear while boosting drilling speed
• ANSI Standard B212.15 compliance - confirms the bit meets established industry dimensional and performance tolerances, giving contractors confidence in fit and interchangeability
• High-volume, multi-flute spiral - quickly channels concrete dust out of the hole during drilling, reducing clogging and heat buildup while improving drilling speed and hole cleanliness
• 4 x 90 deg. Quad Head geometry - crushes through rebar and prevents sticking in reinforced concrete, allowing continuous progress without the bit binding or locking up
• SDS-plus shank - provides a secure, tool-free chuck connection compatible with standard SDS-plus rotary hammers, combining positive drive engagement with effortless bit changes on the job

Why This Product

• Built specifically for reinforced concrete - the 4 x 90 deg. Quad Head carbide tip is engineered to crush through rebar rather than bind against it, keeping work moving on reinforced slabs, walls, and structural concrete without costly stoppages
• Premium materials for professional longevity - the combination of uniformly brazed carbide inserts, a chromium-nickel-molybdenum steel alloy body, and a heat-treated, shot-peened finish means this bit resists wear and bending forces through demanding, high-cycle use
• Faster, cleaner holes with less effort - the high-volume, multi-flute spiral actively evacuates concrete dust throughout drilling, reducing friction and heat so the bit stays sharper longer and holes are completed more quickly
• Verified quality from a trusted professional brand - manufactured to ANSI Standard B212.15 and built to meet the precise tolerance requirements set by Simpson Strong-Tie, this bit reflects the same engineering discipline found across the full Simpson Strong-Tie line of drilling and fastening solutions

Specifications

• Model Number (MPN): MDPL12518Q
• Brand: Simpson Strong-Tie
• Shank Type: SDS-plus Shank
• Head Type: Quad Head 4x Drill Bit
• Diameter: 1-1/4 in.
• Overall Length: 18 in.
• Drilling Depth: 16 in.
• Material: Hardened Steel (Chromium-Nickel-Molybdenum Steel Alloy Body with Carbide Tip)
• Compliance: ANSI Standard B212.15
• Country of Origin: Germany

Frequently Asked Questions

What makes the Quad Head design on the MDPL12518Q superior for reinforced concrete drilling?

The 4 x 90 deg. Quad Head geometry is engineered to crush through rebar rather than binding against it, which prevents the bit from sticking in reinforced concrete. This design allows continuous drilling progress even when rebar is encountered, improving both safety and productivity on reinforced concrete applications.

How deep can the Simpson MDPL12518Q drill?

The MDPL12518Q has a maximum drilling depth of 16 in., with an overall bit length of 18 in. and a diameter of 1-1/4 in., making it well suited for deep anchor and fastening applications in concrete and masonry.

How does the multi-flute spiral design benefit drilling performance?

The high-volume, multi-flute spiral design rapidly channels concrete dust and debris out of the hole as drilling progresses. This efficient dust evacuation reduces clogging, minimizes heat buildup, and improves overall drilling speed, contributing to longer bit life and cleaner, more accurate holes.

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