I couldn't rate more than 1 of the 5 softest woods I could find. They fold, bend and twist, although I was as careful as possible. The ones I used were MUCH sharper and the metal was much better. (I watched a video on Youtube where a guy tried to use something similar for picture frames and he had the exact same experience.)
Stainless Steel Bracket Shelves: Industrial Hanging Hardware
8 Review
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Stainless Steel π© Fastener Hardware by BIGTEDDY
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π§ Boeray Stainless Steel Straight Brackets Mending: Durable and Versatile Support Solution
8 Review