A clip (30) securing a heat sink (10) includes a pair of spaced V-shaped main bodies (32) respectively received in grooves (16) of the heat sink. A pair of spaced wings (38) extends outwardly from opposite ends of each main body. The wings are slanted slightly upwardly. A hook (42) is formed at a free end of each wing. Each hook has a V-shaped profile. The wings are wider than the hooks, for facilitating manual operation of the clip.