Flat SDS-Plus Concrete Chisel MEGA 17×250 mm, blade 20 mm - model 81702

Flat SDS-Plus Concrete Chisel MEGA 17×250 mm, blade 20 mm (model 81702) is a heavy-duty demolition and surface-preparation tool designed for use with SDS-Plus rotary hammers. The tool has a 17 mm shank diameter and a total length of 250 mm, with a 20 mm wide flat blade that provides concentrated impact force for chipping, carving and removing concrete, mortar and masonry. The chisel is intended for contractors and DIY users who need a durable accessory for breaking out small areas, cleaning joints and removing coatings or tiles during renovation and repair work.

Advantages

The MEGA flat concrete chisel combines a standardized SDS-Plus shank with a robust forged blade profile to ensure secure retention and effective impact transmission. Its 20 mm flat blade concentrates energy at the working edge for efficient material removal while the 250 mm length allows for deeper reach and improved control. The construction is optimized for repeated impact use with rotary hammers, providing consistent performance during demolition, joint cleaning and surface preparation tasks.

Suitable for

• Chipping and removing small areas of concrete and mortar
• Cleaning joints and removing grout or old adhesive
• Stripping tiles, coatings and render from masonry surfaces
• Carving or shaping concrete edges and creating channels

Key specifications

• Shank interface: SDS-Plus compatible, 17 mm diameter
• Total length: 250 mm
• Blade width: 20 mm flat profile
• Intended use: chipping, carving and removal of concrete, mortar and masonry
• Material compatibility: concrete, brick, block, stone and rendered surfaces

How to use

Insert the 17 mm SDS-Plus shank into the compatible rotary hammer’s chuck until it locks. Select the hammer or hammer-drill mode appropriate for impact chisel use. Position the 20 mm flat blade against the work surface at the desired angle and apply steady guided pressure while operating the tool, allowing the hammer’s impact action to remove material. Maintain a secure grip and correct body stance to control recoil and chisel direction. For deeper removal or longer cuts, move the chisel progressively along the work area rather than forcing a single pass.

Usage recommendations

Use appropriate personal protective equipment including safety glasses, hearing protection and gloves. Match the rotary hammer’s impact energy and rotation settings to the chisel and material. Avoid using a bent or damaged chisel; inspect the blade before use and replace if excessively worn or deformed. For finishing or delicate surfaces, reduce impact intensity and use shallower passes to minimize surface damage.