Muc-Off's Claw Brush is one of the best of it&s kind, a cassette and drivetrain cleaning model brush design that features high quality construction with triple brush heads carrying tough nylon bristles and an integral scraper zone with a pick head and "claw" for in-between cassette cogs. We are appreciative of the handle length, along with the high quality construction overall on this smartly designed drivetrain cleaning tool.