They help a little, but not a total cure for a loose trem arm.

Good: they drop right in, and they steady the arm

These really work, totally stabilized the floppy trem arm on my Strat

TIGHTENED UP THAT SLOPPY ARM !!!!!!!!

steadied my trem arm

The arm stays steady in the former position you let it, ready to be used instantly.

I asked an "expert" why does the tremolo handle always dangle like a dead arm, his response was that it was supposed to look like that.

Works well in my MIJ Strat as well as in various Squiers.

Great accessory for stabilizing wobbly tremolos, as well as for providing a wider range of smooth settings

These little springs are the ones you get with your Stratocaster new however, they get lost and the tremolo arms don't stay in place but use the spring and it works as it was designed..