I know I am adding to the hundreds of positive reviews already but these are worth writing about. I used to use Schaller brand locks before switching to Dunlop. I find the Dunlop to be less dangerous around the finish of my guitar. The strap side of the Schaller locks have some pretty sharp edges that can leave nasty dings in the guitar finish if you are not careful. The Dunlop brand is much smoother in this respect. Many feel the Dunlop locks are too long and will stick out from the guitar more than Schaller but I don't have a problem with that. I feel confident that my guitar is not going to come loose and crash to the floor (with either lock system- but prefer Dunlop).