These are great for the price. The included screw were not quite long enough to get a good grip on the studs through the drywall. I was able to get some deck screws that fit perfectly to work. Lock works well and they hold the guitar well.
It's hard to tell by the description, but this item (602125) automatically rotates the lock pins once the guitar is hung on the bracket. Item 602122 does not have rotating pins to lock the head into place. Both items hold the guitar up well.