Innovative locking cassette removal tool available only from Pedro's. Secure, no-slip, no bloody knuckles, way to hold cassette during removal. Once you try it you'll never go back. Made from heat-treated tool steel for the ultimate in strength and lasting performance. Adjustable to fit 10-23 tooth gear sizes. Compatible with all multi-gear cassettes including 12-Speed. Visit pedros.com/chainfit for compatibility info.