?Function? FOROIRON Trailer Stake Pocket Bracket design to secure 2'' x 4'' lumber, prevent the boards from sliding. The trailer piles provide additional transportation space. Suitable for adding wooden piles and tie down points to trailer use ?High Quality? Our stake pocket for trailer is made of heavy-duty steel, Powder coated surface, which has excellent Weather & Rust Proof performance. Sturdy & Not easy to deform, Durable for outdoor trailer long term use ?Product Size? 6.7"(L) x 2.5"(W) x 1.5"(H). The trailer stake pocket fit for standard 2" x 4" lumber or steel stakes to use ?Installation?The mounting holes fit for 3/8'' bolts. 1. Make sure the install position and install the stake pocket bracket. 2. Insert the 2'' x 4'' lumber or stake, use 3/8'' bolt to secure it ?Package Include?8 Pcs Trailer Stake Pocket Bracket (Note: Our Package not include Bolt or screws)