Feedback Sports Grip Whip Cassette Tool. ntuitive and easy to use the new Grip Whip cassette removal tool makes quick work of any cog removal project. Designed for ambidextrous one-handed operation with an ergonomic textured rubber handle for comfortable grip this tool is compatible with all 5-13 speed cogsets from SRAM Shimano and Campagnolo including SRAM Transmission. Simply depress the thumb lever to open then let the tools spring-assist jaw closure latch onto any cog from 10-24T with 6 points of secure slip-free contact. And if more lockring torque than usual is required extend the handle and add leverage by using an 8mm L-handle hex wrench in the handles 8mm receiver.