Made of oak.
One end is sanded flat to fit against your chair seat, the other is hollowed out to hug the back rail. 11” long overall, 6-1/2” high x 5-1/4” deep when installed. Set includes 1 left hand and 1 right hand hiphugger – enough to build or restore one chair. For extra strength place a metal clip over the pre-drilled hole before screwing the hiphugger to the chair.