Recommended Use: bike maintenance Manufacturer : limited Removing a cassette is near impossible without a proper lockring tool, which is why hooks it up with the FR-5. 2 Cassette Lock Ring Tool. Designed to make your life a little easier, this lockring tool uses a one-inch base perfect for fitting on wrenches or bench vices, and makes it easy to remove cassettes without the removal of cones and locknuts. It has a 12-spline design, and works on , SRAM, , , and other cassette lockrings, along with some disc brake lockrings. Cylindrical diameter: 4mm Square diameter: 8.5mm 11 tooth diameter: 24mm Nut outer diameter: 23.5mm colour:black Material:steel Package Contents: 1 * Lockring Tool Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.