Call me old school, but I just buy a pack of Grolsch beer and take out the rubber gaskets from the bottles. They work pretty well with flared strap buttons. I’ve never had one fail on me, but I’m not throwing my guitars around much when I’m playing.

Schaller style straplocks. Get Schallers if you’re feeling fancy but the Harley Benton version is just as good.

I find these work great for me. I don’t get too crazy though.

https://www.amazon.com/Fender-Strap-Blocks-2-Pair/dp/B00B5LDMH6/ref=asc_df_B00B5LDMH6/?tag=hyprod-20&linkCode=df0&hvadid=312150857943&hvpos=&hvnetw=g&hvrand=4843461377871908880&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1027744&hvtargid=pla-406164098313&psc=1&tag=&ref=&adgrpid=65054436154&hvpone=&hvptwo=&hvadid=312150857943&hvpos=&hvnetw=g&hvrand=4843461377871908880&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=1027744&hvtargid=pla-406164098313

I have the Schaller ones and can definitely recommend them. They are strong and built to last. I recommend a dab of loctite on the threads for the strap side to make sure it doesn’t loosen up over time.

This is sort of old but I always make a point to recommend DiMarzio because nobody else seems to. I’ve seen all of the typical straplock designs fail, but I’ve never seen a DiMarzio strap fail. I straight up don’t trust anything else anymore