You use these little guys to keep your aluminum shafts tight. Simply place over the threads of your shafts. Tighten them down until you feel 'em grab hold. That's as tight as you need to get them.
They are available in 3 different quantities - Individual packs of 3, Approx 30 (w/ applicator), or bag of 100.
Discounts (where applicable) will be applied when you add to your basket.