Does what it says.
"What's to say? It's a cap, it fits. Lost 2 stars because like most caps if this type it has a tendency to come loose and disappear on the trails if you don't keep it drowned in locktite. Gained a star because the cassette tool interface is so much easier to use than a pin spanner (come on SRAM, I'm looking at you). Fits my DMR Axe cranks perfectly."