Plenty of players will get by just fine and without incident without a locking system of any kind for their guitars and guitar straps, but for players of especially heavy instruments, such as Les Pauls and many bass guitars, or guitars that have small or shallow strap knobs, it’s a good insurance policy. Several of the models on our list come with locking systems, but there are plenty of standalone locking systems available that are affordable and will fit a wide variety of straps and guitars.