The DeWALT 5/8 in. x 10 in. x 12 in. SDS-Plus 2-Cutter Hammer Bit (DW5447) is a professional-grade rotary hammer drill bit engineered for reliable performance in concrete, masonry, and anchor installation applications. Built with a strong tapered core and dual carbide-cutting edges, this SDS+ bit delivers clean, round holes that allow for secure anchor placement - making it a dependable choice for contractors and tradespeople who demand consistency in demanding drilling conditions. DeWALT backs this bit with a No Break Guarantee, giving users added confidence on every job site.

Key Features

• Tapered core for bit strength - the strong internal taper resists flute breaks even when drilling deep holes, reducing costly bit failures and downtime on the job site.
• Two-stage flute design with variable helix pattern - moves debris away from the contact zone quickly and efficiently, allowing for faster drilling speeds and less overheating in concrete and masonry.
• Two sharp carbide-cutting edges - deliver clean, true, round holes in concrete and masonry surfaces, which is critical for proper anchor seating and load-rated installations.
• Wear mark indicator - provides a visible reference for accurate hole diameter, helping users confirm the bit is still within usable spec before committing to an anchor installation.
• No Break Guarantee - if the bit fails for any reason while the wear mark is still visible, DeWALT will replace it, offering professional-grade assurance and long-term value on high-volume drilling tasks.
• SDS-Plus shank interface - compatible with SDS+ rotary hammers, providing a secure tool-free bit change and consistent hammer energy transfer for efficient concrete drilling.

Why This Product

• The tapered core design directly addresses the most common failure point in deep-hole hammer drilling - flute breakage - making this bit a practical choice for professionals drilling multiple anchor holes per day in concrete or block.
• The variable helix, two-stage flute keeps debris moving out of the hole rather than compacting at the tip, which translates to faster cycle times and less wear on both the bit and the rotary hammer.
• The wear mark indicator removes the guesswork from gauging bit condition - users can see at a glance whether the bit is still producing accurate-diameter holes, which matters for code-compliant anchor installations.
• The No Break Guarantee means this bit is backed by the manufacturer against failure while it is still within usable wear - an added layer of protection for contractors who rely on consistent tool performance across demanding masonry applications.

Specifications

• Manufacturer Part Number: DW5447
• Diameter: 5/8 in.
• Usable Length: 10 in.
• Overall Length: 12 in.
• Shank Type: SDS-Plus
• Number of Cutters: 2
• Pack Size: 1

Frequently Asked Questions

What is the No Break Guarantee and what does it cover?

If the bit fails for any reason while the wear mark is still visible, DeWALT will replace it. This guarantee excludes models DW5400, DW5401, and DW5401B25, but the DW5447 is fully covered under the program.

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

The wear mark indicator is a visible reference mark on the bit that confirms the cutting diameter is still accurate. As long as the wear mark is present, the bit is within usable specification - which is important for ensuring anchor holes meet the required diameter for secure, code-compliant installations.

How does the two-stage flute design improve drilling performance?

The two-stage flute features a variable helix pattern that actively moves debris and dust away from the contact zone as drilling progresses. This keeps the cutting edges engaged with fresh material rather than grinding through compacted dust, resulting in faster drilling speeds and reduced bit wear in concrete and masonry applications.

Is this bit compatible with standard SDS-Plus rotary hammers?

Yes. The DW5447 uses an SDS-Plus shank, which is compatible with all standard SDS+ rotary hammers. The SDS+ interface allows for tool-free bit changes and efficient transfer of hammer energy from the tool to the bit tip during concrete and masonry drilling.