SDS+ Flat Chisels

SDS+ flat chisels are the workhorses of any demolition or chasing job. Whether you are breaking out old tiles, chasing channels in blockwork, or stripping a concrete floor, a decent flat chisel in your SDS+ hammer does the job faster and with far less effort than swinging a bolster by hand. These chisels are available in four widths: 20mm, 40mm, 50mm and 75mm, so you can pick the right tool for the job rather than forcing one size to do everything. The 20mm is ideal for tight chasing and precision breaking; the 75mm covers ground quickly on broader demolition work.

The SDS+ shank fits the vast majority of rotary hammers on UK sites, from the big-name brands down to the jobsite combis that have been kicking around the van for a decade. You just push the chisel in until it clicks, and you are ready to go. No adapters, no fuss.

Where SDS Flat Chisels Earn Their Keep

These are bread-and-butter tools for first-fix trades, general builders, groundworkers, and renovation crews. Tile removal is one of the most common uses, particularly on walls and floors where the tiles are well bonded and the alternative is hours with a hand tool. Chasing brick or block for cable runs and pipework is another everyday job where a flat chisel paired with an SDS+ hammer keeps things moving. On larger breaking jobs, the 75mm width helps you shift material without constantly repositioning.

Concrete screeds, lightweight blocks, plasterboard fixings gone wrong, old adhesive beds — there is a broad range of situations on any refurb or new-build site where reaching for an SDS flat chisel is the sensible call. Having a couple of widths in the bag means you are not improvising with the wrong size.

Sizing Guidance

If you are chasing conduit runs, the 20mm or 40mm will give you control. For stripping tiles or breaking out sections of screed, the 50mm or 75mm will save you time. Simple enough, though it is worth having at least two widths on site to cover both scenarios without swapping tasks mid-job.