Park Tool SR-1 Sprocket remover, chain whip

A chain whip is used in conjunction with a cassette lockring remover to remove a cassette type gear cluster. It keeps the cassette freehub body from ratcheting backwards while the lock ring is being unscrewed.

The chain whip is also used as a wrench to unscrew threaded sprockets.

Features hex socket to hold a Park freewheel puller. Fits 3/32" cogs only.