BalancePoint Cool Tool + 25 O Rings - The best O'ring Installer Applicator Made The Balancepoint Cool Tool is the only O'ring installer which allows you to carry your spare O'rings on the installer. No need to go searching for your bag of O'rings (which you lost in the car). Simply slide the O'rings down the Cool Tool onto your shafts or tips. Includes 25 O'rings.