I purchased my dumbbell set back in July 2020. I just now used them for the first time (can't rush these things) and I can't even hold my arms up on the desk to type. I'm totally starting over again from square one, BUT... I'm starting and that's all that matters.
If you're looking for an adjustable dumbbell set these Nice C Adjustable Dumbbells are really great. You can adjust the weight of the dumbbell by adding our subtracting the little weights that come inside of it. I've included the link here on Amazon. I'm not getting paid to share this link or information. There are many others that are cheaper but I can't speak to the quality.