The SR-2.3 is a sturdy, professional chain whip built for daily use. Securely holds all 7-to-13 speed road and mountain bike cassettes, including SRAM® eTap® AXS® & Shimano® XTR® 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.