Buyers Products Bolt-On Trailer Winch allows flexible winch placement along a trailer’s side channel. This portable design allows you to position your strap points wherever needed to optimally secure your load. The winch is made of durable steel with a corrosion resistant black powder-coated finish. The fully slotted mandrel makes it easy to thread the strap through. The winch is designed for use with 4 in. straps. It has a working load limit of 5500 lb. Strap sold separately.