The Park Tool Cassette Lockring Tool makes it easier than ever to remove a 7 to 12-speed cassette. It is compatible with most models including Shimano and SRAM. It also fits disc brake lockrings and adaptors with 12 internal splines. The tool can even fit some RockShox suspension fork caps. The tool is made with a heat treated steel alloy, so it is sure to last a long time. Thin walls make it easy to use without removing cones and locknuts while the hexagonal base makes it compatible with a wrench, socket, or vise. The Park Tool Cassette Lockring Tool is an easy way to remove your cassette.