It has a 220mm long working length (370mm overall) with a 5mm thick by 25mm wide blade. Fitted with a hand guard this chisel is specifically made for removing single bricks cleanly and efficiently without damage to the surrounding masonry, in order to fit air bricks, vents etc. The secret lies in the hardening process, something the Ansell forge in Sheffield are expert at. The long length means you can even remove individual large and thick blocks leaving a clean well finished job. Domed head for safety. Made in Sheffield UK.