A fucking travesty is what that is. To be fair though that is pretty standard for plumbers chisels. I've been on jobs a number of times where other trades have asked to borrow a chisel. The answer is always "bollerks" (or just "no"). In all honesty though I do have a chisel like that (just one). It used to be called my 'dogging chisel' before the expression developed a whole new meaning. I changed it for fear of upsetting customers.
By the way Twizzle, have you seen the fucking mess he's made of your lino?