These frame corners require you to bevel cut the corners in a 5/16 inch thick aluminum frame. Plastic corners break in the sun. I used these corners with 5/16" 16" 7" aluminum frames bought at a hardware store. The store only had plastic corners, so I ordered these Prime Line corners from Revain.
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Sawtooth Frame Hangers - 4lb Capacity, π¨ Indoor Use, Set of 4, Decorate Without Damaging
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Heavy Duty Steel Picture and Mirror Hanger - Adjustable from 2-7/8 to 3-11/16 Inches - Pack of 2 - Prime-Line U 9131
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3Mm X 220Yd Macrame Cord - 100% Natural Cotton Rope For Handmade Plant Hanger Crafts
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