Chromoly Adjustable Strut kit. All hardware is supplied for cpmplete install. Hardware is stainless and nylon locking nuts with quick pins for adjustment in height and pins for lower bracket to be able to open hatch when needed. This is our 4pc kit that we add to all larger version wings we offer, Eg-H Pro Wrap etc. These kits are also sold to those that have competitors wings that sag or came with hand bent tabs and screws.