These garden containers are solid and well made. I especially like the durable black edging on the rim (appears to be similar to auto trim locking edging). It really keeps my beds looking good and protects the paint from chipping. The fasteners in the kit appear to be stainless steel and the bracing appears to be aluminum. I loaded my 32” high beds with logs, branches, leaves, old straw bedding from my animals and cardboard. Topped off with rich soil, sand, peat moss, pearlite, worm casting and debris collected from the lakes spillway. Ooh La La! I grow everything from seed. Everybody is very very happy! The mass and size of the bed really protects root systems from freezing on cold days.