The DeWALT SDS Max Bit for Rotary Hammer - 1 in. x 31 in. x 36 in. 4-Cutter is a heavy-duty percussion drill bit engineered for demanding concrete drilling applications. Built with a carbide tip and manufactured through Iron Blast Technology, this SDS-Max shank bit delivers the durability and speed professionals need when drilling through hard concrete, block, and masonry. With a 31 in. flute length and 36 in. overall working reach, it handles deep-hole applications where shorter bits simply fall short.

Key Features

• Iron Blast Technology: High-speed blasting strengthens the bit body to reduce the risk of breakage - meaning fewer interruptions and lower replacement costs on the job site.
• 4-Cutter Carbide Head: Patented carbide tip geometry with 4 cutting edges breaks up hard concrete with ease - delivering up to 2x longer life compared to competing bits, so you get more holes per bit.
• Rebar Strike Resistant: Designed to resist breakage when striking rebar - giving you confidence when drilling through reinforced concrete where unexpected rebar contact is common.
• No Break Guarantee: If the drill bit fails for any reason while the anchor wear mark is still visible on the product flute, DeWALT will replace it free of charge - a direct commitment to job-site reliability.
• Pilot Point Design: Provides quick starts into the material and accurate holes - reducing bit walk and ensuring precise placement even on smooth or angled concrete surfaces.
• Optimized Flute Design: Removes dust quickly from the hole for fast drilling - keeping the cutting zone clear and reducing heat buildup for sustained performance.
• Anchor Wear Mark Indicator: Located on the flute of the bit, this indicator signals when it is time to change the bit for proper anchor installation - protecting the integrity of anchored connections and preventing under-sized holes.
• SDS-Max Chuck Type: Fits all SDS-Max rotary hammers - ensuring a secure shank engagement and maximum hammer energy transfer during percussion drilling.

Why This Product

• For contractors drilling deep anchor holes in reinforced concrete slabs or walls, the 31 in. flute length and 36 in. total length provide the reach needed without requiring extensions or special setups.
• The 4-cutter carbide head, combined with Iron Blast Technology, makes this bit a strong choice for high-volume drilling where bit longevity directly affects project costs and downtime.
• The built-in anchor wear mark indicator removes guesswork from the anchoring process - ensuring every hole is within spec for safe and compliant anchor installation.
• The No Break Guarantee backs this bit with a real replacement promise tied to the visible anchor wear mark, giving buyers tangible assurance beyond standard warranty language.

Specifications

• Brand: DeWALT
• Model Number: DW5820
• Product Type: Concrete Bit
• Bit Type: Percussion
• Chuck Type: SDS-Max
• Shank Diameter: SDS-Max
• Diameter: 1 in.
• Flute Length: 31 in.
• Overall Length: 36 in.
• Height: 37.750 in.
• Width: 1.810 in.
• Weight: 3.880 lb.
• Primary Material: Carbide
• Individual or Set: Individual
• Power Source: Non-Energy Using
• Warranty: 30-Day Limited Warranty
• Country of Origin: Germany

What's Included

• 1x 4-Cutter Drill Bit

Frequently Asked Questions

What rotary hammers is the DW5820 compatible with?

This bit uses an SDS-Max shank and is compatible with all brands of SDS-Max rotary hammers. The SDS-Max chuck design ensures a solid, locked engagement during percussion drilling.

What does the anchor wear mark indicator tell me?

The anchor wear mark is located on the flute of the bit. Once the wear mark is no longer visible, it is time to replace the bit to ensure holes drilled for anchor installation remain within proper diameter specifications. Using the bit beyond this point risks undersized holes and compromised anchor performance.

How does the No Break Guarantee work?

If your DeWALT drill bit fails for any reason while the anchor wear mark is still visible on the product flute, DeWALT will replace it free of charge. This guarantee applies as long as that indicator remains visible, providing meaningful coverage during the full usable life of the bit.

Is this bit suitable for drilling through rebar-reinforced concrete?

Yes. The DW5820 is specifically designed to resist breakage when striking rebar, making it well suited for drilling holes in reinforced concrete. The 4-cutter carbide head and Iron Blast Technology work together to maintain structural integrity even when unexpected rebar contact occurs.