Extra Long Solid Drop Seats that come with pre-drilled holes and 16 T-Nuts that you can insert where needed. Pre-drilled holes include the abductor and hinge holes. They are made from 1/2" thick 9-ply birch wood and are painted black. No hardware is included. Additional items that may be needed are the Swingtabs and Rail Locks (50474) and a Drop Hook Kit.