RED AXS Front Derailleur Pro Ring Setup Tool Description: Designed specifically for 2x drivetrains featuring RED AXS front derailleurs, this setup tool aligns front derailleurs with large tooth count Pro Chainrings; holding the front derailleur in its place as it is torqued into position. Features: Setup guide for front derailleurs on 2x SRAM RED AXS drivetrains Compatible with 56/43T, 54/41T, and 52/39T chainrings Specifications: Material: Plastic Compatibility: SRAM Red AXS Pro Chainrings (E1)