Old school clamps - not sure you can call them antique, but they're one of those things you look at and say, "don't make them like this anymore". Length is 2 1/2", is marked and can hold 3/4" o/d pipe/tubing, base 7/8' wide with 3/8" hole. Cast iron (and that's true cast iron, not formed), so will rust without paint.
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