Great addition to your 1x drive train, with just the swap of one cog to your existing 10 speed cogset. Increases range to your drive train without breaking the bank. Pair this with a Blackspire Snaggletooth WP ring up front and you're ready to ride. CNC'd 7075 T-6. For Shimano FC-M782, FC-M672, FC-M622 and FC-M612 96BCD cranks. Comes with spacer and longer B’tension screw. For use with 10 speed drivetrains. Anodized with laser etched Graphics. Sizes Available: 40T and 42T for Shimano, 42T for Sram. Color(s): anodized black, red, blue, & silver.