It's the wrench that 'snaps', so you can tighten the weights until that happens if your wrench does that. Some don't though, so just screw 'em nice and snug and they should be fine. It takes a lot of rotations for them to actually go anywhere, if they would ever come loose, which I've never even heard someone mention. I've certainly never had it happen.Hi! Just got new a Mavrik driver! Dumb question but do the weight adjustments just tighten until snug or do they snap-lock like hosel? Anyone ever had one come loose or lost?