D'Addario Flex Lock Strap Blocks - Locks Straps In Place - Protect Your Instrument with No Modifications or Hardware - Easy to Attach - Set of 4 Blocks - Black

These are a nice, simple solution that cannot damage the finish of the instrument. Highly recommend. They are very effective.

They are very easy to put on and takeoff, and it does not let you strap come undone and they don’t cost a lot of money

If you don’t have a locking strap, these babies are a must have!!! Until you’ve had your strap fall off mid gig, you don’t know the terror of that occurring. You can avoid all of that with this product. Super easy to use. They come in a 4 pack so you can pop them on a couple guitars at a time. Built with sturdy rubber, I don’t think these blocks are falling apart, you’ll end up losing them before anything. Great design, they seem to fit on all guitars for the most part. They fit my acoustic, my bass and my guitars effortlessly and they’re not loose at all. Highly recommended!

They work great and are very affordable. Would definitely recommend 👌

I buy, sell and trade guitars often. Mostly high end name brands. For years I have been installing permanent strap locks on all my guitars, which generally involves drilling a bigger hole for the locks and attaching the other ends to my straps. But when I sell the guitars it is difficult to put the original strap buttons back on because the holes are too large unless I fill the holes with glue and tooth picks and then re-drill the hole so I usually leave them installed and also include the strap section so the buyer has the whole set. Those are fairly expensive and not something that increases the resale value of the guitar, so I take a small loss on the strap locks. A few years ago I discovered these washer type strap locks and they have worked great since, with no modifications needed to my guitars. I no longer jump around like Chuck Berry or George Thorogood on stage, ( age related aches and pains from years of wild stage antics) so i don't worry that these strap locks would pop off. If I was more energetic I don't know if I would expect these to hold up, hence the 4 star rating, but for the past few years of using these, I never dropped a guitar or had one pop off. These are on all my guitars now.

The best and most cost effective non invasive solution for locking a guitar strap. I use a Tokai SG124 and SG136 which have smaller strap buttons than a Strat or a Les Paul and these strap locks fitted beautifully. Takes like 5 seconds to mount and dismount. Highly recommended.

I like this rubber locks. They hold the strap in place, are easy to put on and take off and they don't scratch the guitar. The rubber is had enough to stay in place but soft enough to make installation easy. They fit all of my guitars. They work as they're supposed to. So far they haven't come off. The black color blends well with the ends of the straps.

Open mic at Dobbers Bar. Strap disconnected from the rear end of my new best AIO guitar. Damage avoided because I was sitting. Got these rubber keepers. Easy to use, brilliant simple design, cheap price. Keep your eight pound guitar from hitting the floor. Old straps dry out and get loose. These fix that.