How to Square the Square

As woodworkers we rely heavily on our hand tools and expect them to perform as designed.  We hone our plane irons and chisels to keep them sharp, we realign table saws and once in a while may resurface a bench. But then again, some of the tools we use, we take for granted, and expect them to perform as they did when we bought them. Take for example a combination square.  I don’t know about you but that is my go to square of choice – only one moving part – what could possibly go wrong with it…?

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This article first appeared in The GMC Group publication Woodwork Craft 2015