Easily organize all your sockets on these easy to use socket rails. Set includes 1 rail each for 1/4 in., 3/8 in. and 1/2 in. drive sockets (total of 3 rails). This great set is capable of fitting up to 58 total sockets. Each socket clip have a ball bearing that will help hold and secure your sockets under heavy conditions. The high grade anodized aluminum rails with impact resistant ABS clips and steel ball bearings are built for durability and long term use.