i work at a summer camp and a previous staff member bought these holds to use on an outdoor wall. Our wall is make of wood with basic t-nuts, and we would constantly get spinning holds with this set while our 10 year old holds would work just fine. I didnt really think anything of it until I would try to tighten the holds to the wall and they would crack in half, making them unusable. Almost 50% of the holds we bought are now broken in some way after 2 months of use. I would not recommend these holds and next time I will definitely buy a much sturdier hold set.
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