Chain Gap tool for SRAM Eagle axs Chain gap, for MTB Eagle rear derailleur B gap adjustment tool for Sram 50T/52T cassettes chain gap Durable plastic, long time to use For SRAM Eagle XX1, AXS XX1, X01, AXS X01, GX.AXS GX, NX, SX B gap Adjustment Tool for SRAM MTB Eagle Chain gap Rear Derailleur, for SRAM Eagle 52T / 50T Cassettes, for 12 speed, for eagle GX, NX, XX1,X01, eagle AXS