unior 1670.8/2BI Cassette Lockring wrench with guide 350,h2>Product features Wrench for rear sprocket with handle is used for Shimano, SRAM, Sun Race, Suntour and other cassette sprockets, like the key nr. 1670. 7. Fixed handle enables easier use because no additional tools for gripping the key are necessary. The two component sleeve on the handle fits the hand exactly and enables a perfect grip of the key.