Locking Leather Bondage Posture Collar is made from 9/10oz (3.8mm) Latigo leather with three 1.5" welded Nickle Plated D-Rings with locking posts at the sides of the neck. The collar separates into two separate pieces and secures in place with 2 padlocks (Included). Collar is adjustable to fit a size 15"-20" neck.