The HCW-16. 3 is a combination 15mm pedal wrench and chain whip. Use for both pedal removal/installation and for cassette removal. Chain whip features improved compatibility with 7-speed to 12-speed mountain and road bike cassettes. Also compatible with single-speed cassettes with a 3/32" cog. The HCW-16. 3 is 10. 75" long (27. 3cm).