Threaded metal hook. Does anybody know what this is meant to

Designed for home and industrial applications. Two hex nuts included. Standard machine screw threads. For interior and exterior applications. Manufactured from steel wire.

National 3/8 in. x 7 in. Zinc Hook Bolt

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Stable Design ----I-beam design provides stability. Bolt clamp hook set is designed for heavy duty applications. Stainless Steel ---- Made of

2 Set Metal Beam Hook 1 Inch Stainless Steel C Clamps and Heavy Duty Hanging J Hook/Threaded Screw Hook for Garage I Beam

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Wholesale threaded hook bolt Made For Various Purposes On Sale

Threaded hook M6, chrome-plated, M6 x 16

NEW Hook, Threaded, 3 5/8L, pkg of 5

Hook, Threaded, 3 5/8L, pkg of 5

National Hardware 2.8-in Zinc Plated Steel Screw Hook in the Hooks

What is this thing? about waist high, goes up and down, has a sort of lock screw in the middle to keep the bar sturdy. : r/whatisthisthing

Everbilt 3/8 in. x 4-1/2 in. Lag Thread Screw Hook Galvanized