Feedback Sports tools are designed specifically for the needs of professional bike mechanics. Attention to detail and highest quality materials and construction make for the ultimate level of performance and durability. Features: Fits Shimano(R) & SRAM(R) cassette lockring External bottom bracket wrench Centerlock brake wrench Cast steel Limited lifetime warranty Specifications: Weight: .7 lbs Dimensions: 12.5 x 3.5 x 1 in