End to end the bolt is 3 5/8" in length. Half inch diameter at the threaded part with a locking nut. Flat area measures 2.5" long x 1/2" x 1/4". I included a few pictures of what can be done with this type of bolt or you maybe more creative. Very sturdy. Hang your tools onto your rolling tool box, coats, hats, etc. Not your average looking bolt, can be placed horizontal or vertical depending on your application. From a smoke and pet free environment. Please check out my other ads. $1.00 each.