Bought these to store my 1/2" power sockets that I use at my job. Wanted to lose the box they came in and combine them to save space in my tool chest. Very tall Quality. The guides are really strong, there are no bends at all. The fittings snap into my sockets well and hold them in place so they just don't fall off without bothering to get them out. Very satisfied, will be 3/ soon Buy 8" and 1/4" rails!