Climbing cams are ingenious, and anyone who has hung from their fingernails while desperately trying to place a nut in a flared crack knows just how reassuring a good placement can be. They come with 3 lobes (light, able to fit into small slots and awkward places) or 4 lobes (a little heavier and wider but many climbers feel 4 lobes is more stable). If you're looking for a good gift for a rock-loving friend, look no further. A climber can never have too many.
Petzl America Ok Screw Locking Oval Carabiner M33SL
Petzl America Hera Attache Screw Lock Carabiner M35SLHERA
Petzl America William Screw-lock Carabiner M36SL
Petzl America Am'd Tri-act Locking Carabiner M34TL