Bolts. Bolt anchors which are difficult(dangerous) to access. It is possibble to rig and anchor using another rope and a boulder ~30' back.
Start in the chimney to the left of the thin flake. Make ONE chimney move(do NOT climb 10-15' up the chimney in spite of what is written elsehere)and reach right to the very base of the protruding flake(below the first bolt)and a balance move. Climb the face of the flake avoiding the wall to the left treading lightly at the hollow and fractured flake just below the top. Great climb.