Stonemason's chisel (4)

Chisel used by a stonemason.  It has a broad blade, a squared shaft with two dimpled and serrated edges and the corners are chamferred.  The end of the chisel is rounded to withstand impact when struck with a mallet.  The mason's mark is on the side.   Stone was worked using a range of tools including saws and chisels.  Stone mason's tools have changed very little over the centuries.  Finer shaping and detail was worked by striking chisels like this with a large wooden mallet.