24 E Track Wood Holder Bracket Cargo Beam Socket Toy Hauler Van Truck Trailer24 (Twenty Four) New Aftermarket Replacement E Track Wood Beam Holder Fits Various Models: E Track Cargo Holding Systems Tech Information: This is Twenty Four (24) Wooden Beam Socket Holders Commercial grade E or A track wood beam holders. Designed to fit 2" x 4" or 2" x 6" lumber beam sizes. Replaces metal locks or metal beams. Heavy duty Zinc plated steel with spring loaded triggers and locking design. Great for commercial grade utility trailers,