DeWALT 7/8 in. x 16 in. x 21-1/2 in. 4-Cutter SDS-Max Rotary Hammer Bit (DW5816) is a heavy-duty percussion concrete bit engineered for demanding drilling applications in concrete, masonry, and reinforced structures. Built with DeWALT's iron blast technology and a full carbide 4-cutter head, this SDS-Max bit delivers the kind of extreme durability and extended service life that professionals rely on for high-output rotary hammer work.

Key Features

• Iron Blast Technology for Extreme Durability - the bit undergoes an iron blast strengthening process that resists fatigue, so the bit holds up under repeated high-impact use without premature failure.
• 4-Cutter Full Carbide Head with 2x Longer Life - the redesigned 4-cutter carbide head geometry significantly extends bit life compared to standard designs, meaning fewer bit changes and lower long-term cost on the job.
• Stands Up to Rebar Strikes - the redesigned head geometry is built to withstand accidental rebar contact, reducing the risk of catastrophic bit failure when drilling through reinforced concrete.
• Wear Mark Indicator - a visible wear mark on the shank lets you monitor the bit's usable life and ensures you are always drilling accurate-diameter holes, which is critical for anchor and fastener installations.
• No Break Guarantee - if the bit fails for any reason while the wear mark is still visible, DeWALT will replace it, giving buyers a meaningful safety net against unexpected bit failure on the job.
• SDS-Max Shank Compatibility - the SDS-Max chuck interface provides a secure, tool-free bit change and efficient hammer energy transfer, making this bit compatible with SDS-Max rotary hammers across major brands.

Why This Product

• Confidence drilling through reinforced concrete - the 4-cutter carbide head is specifically redesigned to handle rebar strikes, making this bit a practical choice for contractors who regularly encounter rebar in slabs, walls, and structural concrete.
• Backed by a no-break guarantee - DeWALT's guarantee that the bit will be replaced if it breaks while the wear mark is still visible provides real-world assurance, reducing the cost risk of bit failure mid-project.
• Extended bit life means fewer interruptions - the 2x longer carbide head life and iron blast construction are designed to keep the bit in service longer, cutting down on downtime from frequent bit swaps during large concrete drilling tasks.
• 16 in. flute length in a 21-1/2 in. overall body - the generous usable length allows deep anchor hole drilling in thick concrete elements where shorter bits simply cannot reach, expanding the range of applications this bit can handle.

Specifications

• Brand: DeWALT
• Model Number: DW5816
• Product Type: Concrete Bit
• Bit Type: Percussion
• Chuck Type: SDS-Max
• Shank Type: SDS-Max
• Shank Diameter: 3/4 in.
• Shank Length: 1 in.
• Diameter: 7/8 in.
• Flute Length: 16 in.
• Overall Length: 21-1/2 in.
• Primary Material: Steel
• Power Source: Non-Energy Using
• Self Feeding: No
• Individual or Set: Individual
• Weight: 1.950 lb.
• Country of Origin: Germany
• Warranty: 30-Day Limited Warranty

What's Included

• 1x 4-Cutter SDS-Max Rotary Hammer Drill Bit

Frequently Asked Questions

What does the No Break Guarantee cover?

DeWALT's No Break Guarantee means that if this bit fails for any reason while the wear mark is still visible, DeWALT will replace it. This guarantee applies to the DW5816 - note that models DW5861, DW5830, and DW5831 are excluded from this specific guarantee.

Can this bit handle drilling through concrete that contains rebar?

Yes. The DW5816 features a redesigned 4-cutter carbide head with geometry specifically engineered to withstand rebar strikes, making it suitable for drilling into reinforced concrete where accidental rebar contact is a possibility.

What is the wear mark indicator and why does it matter?

The wear mark indicator is a visible marking on the bit that shows the boundary of usable bit life. As long as this mark is still visible, the bit is drilling holes at the correct diameter and remains eligible for the No Break Guarantee. Once the wear mark is no longer visible, the bit has reached the end of its rated service life.

Is the DW5816 compatible with SDS-Max rotary hammers from brands other than DeWALT?

The DW5816 uses a standard SDS-Max shank interface, which is a widely adopted chuck system used across professional-grade rotary hammers. The SDS-Max connection provides secure engagement and efficient hammer energy transfer in any SDS-Max compatible tool.