Clean out or restore damaged threads in crank arms with these pedal taps. The Park Tool Taps can be used with either steel or alloy crank arms. Set includes both right and left-hand threads. The 1/2" size is common on one-piece cranks. Park Tool Pedal Taps Features Includes a set of 2 taps Made of high carbon steel, precision ground, and hardened to stay sharp Fits all conventional tap handles 1/2" or 9/16"