Chisel flat 40 x 300 mm DeWalt DT6984

DeWalt DT6984 is a flat chisel with a 40 mm blade width and a 300 mm overall length designed for manual and powered hammer use. The tool is intended for chiselling masonry, concrete and stone, demolition work and precise removal of material. Built with a hardened cutting edge and a robust shank, this chisel delivers controlled material extraction for both professional tradespeople and DIY users.

Advantages

The flat 40 x 300 mm profile provides a defined cutting edge that helps achieve even and straight removal of material. Construction materials and heat treatment enhance wear resistance, while the length offers a good reach and leverage for heavier tasks. Compatibility with hand-held and pneumatic or electric hammers makes the chisel versatile across different jobsite applications.

Suitable for

• Chiselling and shaping masonry, concrete and natural stone
• Removing tiles, mortar and plaster
• Light to medium demolition tasks
• Precision trimming and edge work on construction materials

When it may not be suitable

This flat chisel is not intended for cutting metal or hardened steel and should not be used on materials that exceed its intended hardness; such use can damage the cutting edge. It is also not designed as a substitute for specialised tooling such as pointed chisels for breaking deep cracks or wide scabblers for large surface removal.

Key specifications

• Blade width: 40 mm
• Overall length: 300 mm
• Intended use: manual and powered hammer operation
• Material treatment: hardened cutting edge for wear resistance
• Profile: flat chisel for straight material removal

How to use

Securely mount the chisel in a compatible hammer or hold it firmly if using manual striking tools. Position the cutting edge against the work surface at the appropriate angle and apply controlled strikes, increasing force as required for the material. Keep the chisel steady to maintain a straight cut and withdraw small amounts of material with each pass for better control and safer operation. After use, inspect the cutting edge for chips or deformation and sharpen or replace the chisel if necessary.

What to consider before purchase

• Confirm compatibility with your hammer type (manual, pneumatic or electric)
• Ensure blade width and length suit the scale of your tasks
• Check that the chisel material and heat treatment meet durability needs
• Consider whether a different chisel profile (pointed, wide, scabbler) is more appropriate for specific jobs

Usage recommendations

Use personal protective equipment including eye and ear protection and gloves. Maintain the chisel’s cutting edge by regular inspection and proper sharpening. Store the tool dry to prevent corrosion and avoid striking the chisel with hardened or inappropriate tools to preserve tool life.