What are these? Socket like parts are brass and two brass rings of

Made of brass, measures about 6 x 4 and the nipples are threaded inside : r/whatisthisthing

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What are these? Socket like parts are brass and two brass rings of different sizes, wrench looking part is steel. But the brass sockets don't seem to fit the wrench part.

Solved A brass plug is to be placed in a ring made of iron.

MOEN Brass Rough-In Posi-Temp Pressure-Balancing Cycling Tub and Shower Valve with Stops - 1/2 in. CC Connection 2570 - The Home Depot

Antique brass finish S-type, 2 light with pull chain lamp cluster, 14 of 18/2 SPT-2, 105°C, Choice of tap, Antique brass finish, S-type, two light

2-Light S-Type Antique Brass Finish Wired Steel Lamp Cluster w/Pull-Chain (E-26) Lamp Sockets, Choice of Tap (10412A)