After getting so excited, jumping into your truck and taking on the trails, the last thing you want is the loud noise those annoying shackles sliding back and forth! That's where the Moose Knuckle Rattle Rings come in! These Nylon 6/6 rings in both 2mm and 3mm sizes offer you the perfect spacer to isolate your shackle and keep it from banging against your bumper or receiver's mounting! Also, they are available in 11 great colors so you can match the look to your truck and your shackles! Another great benefit with the Rattle Rings is that the isolation they provide will protect the coating of your shackles from being worn away over time from constantly rubbing and banging against each other! You should be listening to the sounds of your adventure, not the sounds of those shackles; order your Moose Knuckle Rattle Rings today!