3pc ABS Plastic Socket Holder Tray Sets Metric 1/4" , 3/8" , 1/2" dr Rail TE834. Metric Socket Holder Socket Organizer fits most socket designs. 3 Trays included in the kit Easily mounts to walls and pegboard. Printed sizes allow quick identifications and organization. Durable ABS plastic. Drives: 1/4" & 3/8" & 1/2". We have other Socket Rails And Trays available in our shop.