8Pcs Heavy-Duty Bolt Down Anchor Points Steel Threaded Rail Stud Nut Bearing 6000 LBS for Truck Bed Trailer Cargo Control Pickup. Feature: Versatile Securing Solution, Strong and Safe, Weather-Resistant, Easy Installation, Multipurpose Cargo Management. Specification: Origin Mainland China, Material high density steel, Color black, Quantity 8PCS, Specification L-shaped track, Single maximum bearing capacity 6000LBS, Product size 40.00x37.00x14.00mm, Single weight about 55g, Suitable for cargo, utility trailers, enclosed trucks and trailers.