A carpenter, a fitter & turner and a brickie are having a beer after work when the conversation gets around to quality and accuracy of work.

The carpenter says "Well I have to get things accurate to within 1/32" and I think that's hard to beat."

"So what" says the fitter & turner "I have to be accurate to 1/1000"."

A moments silence and they turn to the brickie.

"You bastards know nothing. I have to get it right!!"