The SR-2.3 is a sturdy, professional chain whip built for daily use. Securely holds all 7-to-12 speed road and mountain bike cassettes, including SRAMA(R) eTapA(R) AXSA(R) & ShimanoA(R) XTRA(R) 12-speed systems, as well as single-speed cassettes with a 3/32" cog. The heavy-duty heat-treated head with hardened chain retention pins ensures a lifetime of reliable use, and the long vinyl-dipped handle ensures comfort and ease of use. SR-2.3 FEATURES Compatible with 7-to-12 speed road and mountain bike cassettes including SRAMA(R) eTapA(R) AXSA(R) & ShimanoA(R) XTRA(R) Compatible with single-speed cassettes with a 3/32" cog Length: 38 cm (15")