Unior cassette tool 1670/2bi-us 11/12 This tool replaces the traditional chain whip and makes holding the smallest sprockets on the cassette easier during maintenance or replacement. Thanks to the opening in the middle, you can easily access the lockring. For cassettes with the smallest sprockets of 10 and 12 teeth, the pins on the 12t side are longer, so that the tool correctly grips the 12-tooth sprocket to safely remove the 10-tooth sprocket. This allows you to efficiently loosen or tighten all cassettes with small sprockets without damage. Unior Article number: 734838 EAN code: 3838909249315