This combination chain whip and freewheel / lockring remover wrench is heat treated to prevent bending and flexing, with a molded handle for comfort. – 3/32-inch model Works on 5- to 12-speed cassettes and freewheels – 1/8-inch model works on 1/8-inch chains and sprockets – 1-inch (25.4mm) box-end wrench fits Park Tool Freewheel/Cassette Lockring Tools – Features hardened pins to keep the chain in place