Rubbermaid / Closet Maid Universal Pole Clamp.
Repairs / Replaces to a Heavy Duty double hook ... Holds up / more stable, better than one hook clamps.
5/16" on inside of hook for wire shelf, 1/2" on pole side to fasten.
Old Rubbermaid Model # 45100.
This is One NEW Clamp.
Color is White, as the pole and shelf.
Fits the Closet Maid Pole item # 100900.