Based on this product's specifications, here are some alternatives and similar models
Masonry chisel DeWalt DT6822 flat tip 300 mm, 25 mm cutting edge, 1 pc
Summary description:
DeWalt DT6822 masonry chisel with a flat tip, 300 mm overall length and a 25 mm cutting edge. Designed for chipping, dressing and removing mortar or brick material. Solid construction suitable for manual hammer work; supplied as a single piece. Use for masonry, restoration and general building site tasks requiring a robust flat chisel.