Description The Chain Drive is a sleek, shop-quality chain breaker. Its designed from cast and CNC-machined steel in an ergonomically contoured shape for comfort and ease of use. The innovative, adjustable design works with most 8/9/10/11/12 speed bicycle chains. It features a hardened steel breaker pin and includes an extra pin stored in the handle. SPECS WEIGHT: 93g WRENCH: Mavic Splined Road and MTB, 3.22, 3.45