Socket rail holder 12 pc set 1/4 3/8 1/2 drive ball and socket lock mountable This kit includes 4 of each of the following rails 1/2" 1/4" and 3/8" Fits in most tool chests, can be mounted onto wall or pegboard Capacity Per Rail: 1/2" drive - 12 sockets 1/4" and 3/8" drive - 16 sockets each Rails included : 4 x 1/2" Drive 4 x 1/4" Drive 4 x 3/8" Drive Overall dimensions per rail: 14" L x 1" W