A traditional wood worker's tool modified and improved for the potter to make lids for any pot.

• Take one measurement and you have its opposite immediately.
• Does the work of standard calipers with far greater speed and accuracy.
• You can also make a lid for an already fired pot by reassembling the wing nut and screw in the 12-1/2% hole. Your lid should shrink to fit the pot.
• Standard fits lids 0” - 11-1/2”
• Large fits lids 0” - 20”

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