I designed some hanging hooks to go on a curtain rod for hanging kitchen tools and such. From what started as a weird doodle on a napkin and to having something in hand and much stronger than I anticipated is rather cool!

Dimensions:
Made to fit 13.5MM Rod
78MM Long
8MM Thick
20MM Deep (from the rod hole)
~40MM Deep (total)

The structure inside is much more robust than I would initially think it is.