Flat chisel Dedra DED78482 410 x 30 mm – HEX shank, flat blade for masonry and demolition

The Dedra DED78482 flat chisel is a 410 mm long demolition and masonry tool with a 30 mm wide flat blade and a HEX shank designed for secure engagement in compatible rotary hammers and demolition tools. It is intended for chiselling, cutting and removing concrete, brickwork, render and other masonry materials. The chisel’s length and blade width provide reach and surface coverage for removal and profiling tasks in renovation and construction work.

Advantages

The hexagonal shank ensures a firm, non-rotating fit in tools with compatible chucks, reducing slippage during heavy-duty impact work. The flat blade geometry concentrates impact energy along a broad cutting edge suitable for breaking out render, knocking off tiles or dressing concrete. Its 410 mm length gives improved reach into deeper joints and cavities while keeping the user at a safer distance from the working surface. Constructed for repeated impact use, the tool balances durability and work efficiency for both professional and DIY applications.

Suitable for

• Removing render, plaster and tile adhesive
• Chiselling and shaping concrete and blockwork
• Demolition of small masonry elements and removal of loose material
• Surface preparation before re-surfacing or waterproofing

Key specifications

• Overall length: 410 mm
• Blade width: 30 mm (flat blade)
• Shank type: HEX (hexagonal) for secure tool engagement
• Blade profile: flat cutting edge for surface removal and dressing
• Intended material: masonry, concrete, render, brick

How to use

Insert the HEX shank into a compatible rotary hammer or demolition tool according to the tool manufacturer’s instructions, ensuring the locking mechanism engages fully. Position the flat blade against the work surface and operate the tool at an appropriate impact setting for the material. Use steady, controlled passes to remove render or break out masonry while keeping hands and body clear of flying debris. Periodically clear chips and dust to maintain visibility and reduce wear on the blade. Inspect the chisel for signs of excessive wear or deformation and replace it if the cutting edge becomes compromised.

Usage recommendations

Use appropriate personal protective equipment such as safety goggles, hearing protection, dust mask and gloves. Match impact power and tool speed to the material and task to avoid premature chisel damage. Keep the blade clean and straight; avoid levering the chisel as a pry bar to prevent shank or blade failure.