The invention proposes a switchable component (1) for a valve train of an internal combustion engine, said component (1) comprising a housing (2) in whose bore (3) an axially displaceable inner element (4) comprising coupling elements (5) is received, said coupling elements (5), for effecting coupling, being able to be brought partially into engagement with an entraining surface (6) of the housing (2), the inner element (4) being biased in outward direction from the housing (2) by a lost motion spring (7), and an (outer) anti-rotation device (11) extending from an outer casing (10) of the housing (2) projects beyond a surrounding structure (12a), the outer anti-rotation device (11) is configured as a C-shaped, thin-walled ring (13) comprising a slit (12), said ring (13) extends after the manner of a clip in an annular groove (14) in the outer casing (10) of the housing (2) parallel to a transversal plane of the component (1) and, for effecting outer anti-rotation, said ring (13) projects with a sickle-like portion (15) of its outer peripheral surface (16) beyond the outer casing (10) of the housing (2).