The present invention provides a coupler (201), use of the coupler (201), anda utility vehiclehaving the coupler (201), the coupler (201) having a body portion and alinearly movable rail(235), arranged to be moved by an actuator, the body portion comprising anopen jaw (207)arranged to receive a mounting formation of a tool, the rail having a firstposition in which therail (235) is retracted relative to the open jaw (207) and in which a mountingformation canenter a recess defined by the jaw (207), and an advanced position in which therail (235)restricts the opening to the jaw (207), thereby arranged to trap, in use, themountingformation in the recess.