Universal replacement Adjustable shoulder strap for your all kinds of bags such as：Violin Case/ Guitar Case Cello Case Laptop / computer bag ,Briefcase, Messenger bag, Carry bag, School bag, Duffel bag, Diaper bag, Tool bag, Guitar bag, Violin bag The strap material : high quality Nylon. much more stronger than normal nylon straps. Top grade materials will provide you with years of use and comfort. The shoulder strap adjusts from 27 -36 inch； Hooks material：metal. Allows for 360 degree rotation and Super sturdy, can safely hold 534 pounds (267 pounds per Hook)