Sturdy design, feels really solid and was easily assembled. With each piece clearly marked so anyone could put it together in just 10 or 15 minutes. B1 connects to C1, B2 connects to C2, a few extra nuts and bolts included in case you lose one. This safety rail makes it possible to let a loved one use their toilet by themselves without risk of falling, and this gives much-desired dignity to the user. Caregiver doesn’t need to sit in the bathroom watching the user, dignity is preserved.