These are 1x boost chainrings that go with White Industries M30 & R30 cranks.
You will want this ring if you have a Scapegoat or an Evasion set up thru axle.
Works with SRAM 10/11/12 speed and 12 speed flat-top chains
Works with Shimano 10/11/12 speed chains
Works with singlespeed 3/32 chains
Made out of 7075 Aluminum in the U.S.A