Chisel SDS‑Max DeWalt 25 x 400 mm DT6812 — demolition and chiseling bit

DeWalt SDS-Max chisel 25 x 400 mm DT6812 is a demolition and chiseling bit designed for use with SDS-Max rotary hammers and demolition hammers. The forged steel body and sharpened cutting edge deliver reliable performance when removing concrete, mortar, tiles and other masonry materials. With a length and profile configured for medium-duty demolition and precise chiseling, this bit is intended for professional construction and renovation tasks that require controlled material removal and a durable tool life.

Advantages

This SDS-Max chisel features a hardened steel cutting edge that maintains shape under impact and resists premature wear. The shank is manufactured to SDS-Max dimensions for secure retention and consistent hammering action in compatible tools. Its 400 mm length provides reach into deeper joints and cavities while the 25 mm blade width balances material removal rate with the ability to work with some precision. The bit’s construction reduces the need for frequent replacements and supports steady productivity on site.

Suitable for

• Chiseling and shaping concrete and masonry
• Removing plaster, tile and mortar
• Medium‑duty demolition tasks
• Preparing surfaces for repair or renovation

Key specifications

• Shank type: SDS-Max compatible shank
• Working length: 400 mm total length
• Blade width: 25 mm
• Material: forged/hardened steel cutting edge
• Intended use: demolition and chiseling in concrete and masonry

How to use

Insert the SDS-Max shank into a compatible rotary hammer or demolition hammer following the tool manufacturer’s instructions until it locks. Position the chisel at the intended work surface and operate the hammer at appropriate power settings for the material and task. Use steady, controlled strokes and allow the tool’s impact force to do the work rather than forcing the bit. Periodically stop to clear debris from the working area and inspect the cutting edge for wear. Replace the bit if the cutting edge becomes excessively rounded or damaged.

Usage recommendations

Use personal protective equipment including safety glasses, hearing protection and gloves. Match hammer power and impact frequency to the task — use higher impact settings for heavy removal and lower settings for more precise chiseling. Store the bit in a dry place to prevent corrosion and check compatibility with the specific SDS-Max tool before use.