Park Tool

2 x 15mm open wrenches provide the best mechanical advantage, regardless of the pedal position
Extra long round, vinyl-dipped 36cm handle

The CT-3.3 is a professional shop-quality tool for removal and installation of bicycle chain rivets for chain sizing and replacement. Compatible with virtually all single-speed and multi-speed chains* including SRAM® Flattop™ and SRAM® T-Type.