It is aftermarket parts compatible for Harley Sportster , Wide Glide, Street Bob, Roadking, Fatbob, Streetbob, Softail, Dyna, Street Glide, Road Glide, Ultra Glide, Touring 1996-later and other model with 1/4"-20 thread.
Knurled sides for easy grip & quick release, no tool required to install & remove
Thread type is 1/4"-20,replaces the standard seat bolt