Proper job

DDW's January Challenge Day 13 : Square

This is my square, for making sure that right angle corners are actually right angles. It isn't used that often, but it is always in the same place in the back of the van. I have had it since before I was a plumber and it has helped me set up various bits of stone carving, woodwork and tiling...

I am a bit bowled over by the amazing news from HV