Chisel (SDS) DeWalt 70 x 250 mm DT6999

DeWalt SDS chisel 70 x 250 mm DT6999 is a heavy-duty masonry chisel designed for use with SDS rotary hammers and demolition hammers. The 70 mm wide blade and 250 mm overall length provide a balance between reach and leverage for removing concrete, masonry and ceramic tiles, as well as for chiselling, grooving and general demolition tasks. The SDS shank ensures fast engagement and a secure fit in compatible hammer drills, enabling reliable power transfer and consistent impact performance on construction and renovation jobs.

Advantages

The hardened and precisely ground blade offers improved durability and wear resistance during repeated impact work. The 70 mm cutting width enables efficient material removal across broader surfaces compared with narrower chisels, while the 250 mm length gives additional reach for recessed areas. The SDS connection provides quick tool changes and stable retention under heavy loading, reducing slippage and improving energy transfer from tool to workpiece.

Suitable for

• Removing concrete and broken masonry
• Stripping or lifting ceramic and stone tiles
• Chiselling grooves and channels in masonry
• Demolition and renovation work requiring broad material removal
• Preparation of surfaces for repair or installation

Key specifications

• Blade width: 70 mm
• Total length: 250 mm
• Shank type: SDS (for rapid engagement in compatible hammers)
• Material treatment: hardened and ground impact steel for wear resistance
• Application: masonry, concrete, tile removal, chiselling and grooving

How to use

Insert the SDS shank into the chuck of a compatible rotary hammer or demolition hammer until it locks. Position the chisel blade against the work surface at the required angle and start the hammer at low speed to establish the initial cut or break. Apply steady pressure and allow the tool's impacts to do the work rather than forcing the chisel; adjust the tool's impact settings as needed for material hardness. Periodically inspect the blade for wear or deformation and replace it when performance decreases to maintain efficient and safe operation.

Usage recommendations

Use appropriate personal protective equipment including eye protection, hearing protection and gloves. Match the chisel to the correct size of rotary or demolition hammer and avoid using the chisel on materials or in tool models not designed for SDS impact chisels. For best results on large surface removal, use measured overlapping strokes and maintain a stable stance to control rebound and reduce operator fatigue.