Who would’ve guessed - tong dimensions and other forging info in Machinery's Handbook (older 20th Edition). I doubt the current Handbook contains this info.
Blacksmith's Depot's (Kayne & Son) Off-Center tongs are DROP FORGED in the USA
Originally Designed and drop forged by Grant Sarver of Off-Center Products on the west coast. Now drop forged in North Carolina.
"We drop forge and mate each half of our tongs for the best fit. Each tong is sized specifically for the size that is it s designed for, but will hold many more sizes than what is marked on them. The handles of our tongs are broader to increase the surface area resting on your fingers allowing you to work longer.. "