Simplify your drivetrain maintenance with the Abbey Bike Tools Single Sided Crombie Tool. The Single Sided Crombie Tool features a long stainless steel handle that gives you excellent leverage, and the deep teeth connect securely to soft alloy lock rings without causing damage. This makes removing or installing a cassette quick and easy. The Single Sided Crombie Tool is available in one size and in either a Shimano/SRAM or Campagnolo compatibility.