Pi Ruler or Pie Ruler? The Tinner's Rule

A tinsmith's ruler, or tinner's rule, is a fascinating tool. It measures pi, for measuring pie. And other round things.

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Everything presented in this video and on this channel is for entertainment purposes only. These are my opinions and should not be taken as advice or directions. Use your own discretion, be responsible, be safe, handle tools according to manufacturers' directions, talk to your doctor for medical advice, etc.......

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