Bought for work as there is a thief among us. I took home my father's 50 year old sterret and other good tools until the thief is caught or falls into star flight. This device doesn't even last a month. slide groove ruff. The locking screw tends to fall out when removed. After removing the center finder, corner block and angle and reinserting it only after the ruler is already scratched. I'd say it's evidence of a thief. Guilty. Should have bought another Sterrett and just kept an eye on it while working. I know Sterrett is worth a lot of money. But it will last for generations. This device costs 1/5 the cost of Sterrett.
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