Will fit one-key release retaining rings on shimano and campagnolo cranksets and the adjusting cone on most freewheel clusters (not freehubs); Adjusts to a wide range of pin hole widths, pin diameter is nomsung 0.090 inch (2.3mm); Tough, high carbon tool steel is used on each tool to ensure long life; Handle is vinyl coated to give a good grip; Each pin spanner is color coated for easy recognition