Race Face OVAL chainring.Our premium 1X RaceFace direct mount Oval chainrings are designed for CINCH system RaceFace uses to mount chainring directly to the crank. If you have 4 arm RF crank look at 104bcd Oval ring.CNC machined 7075 Txxx Aluminum. Long-lasting construction.Great traction at the fraction of the price ! Narrow Wide tooth profile.6mm OffsetCompatibility..RaceFace Cinch system cranks. RF Next SL RF SIXC RF Turbine RF Atlas AEFFECT CINCH cranks. Fits Boost148 frames as well