The Wolf Tooth Chain Whip is part of their ultralight Pack Tools series, built from high quality weight conscious materials for those that do mobile wrenching and traveling with their bike. This lightweight chain whip is strong enough to be your go-to tool, but light enough that you won't think twice about grabbing it before heading to the trailhead or embarking on a multi-day riding trip. It's compatible with any cassette up to and including 12-speed cassettes, and has an ergonomic handle with finger grooves for a no-slip grip, because nobody likes jamming knuckles into their cassette teeth.