Camp Tri Cams are versatile, lightweight and compact, working well where other nuts and cams are almost impossible to place, such as narrow pockets and peg scars. This is due to the fact that they operate using a single camming unit, allowing them to be placed in very narrow positions, where spring-loaded camming devices (Friend's, Camalot's etc.) will not fit. All the smaller sizes are particularly good in this sort of scenario, with sizes 2 and 2.5 being the right size for many quarry shot-holes.
In their simplest mode, Tri climbing cams can be placed like a standard chock/nut. However, to take advantage of a Tri Cams full potential in cracks, scars and solution pockets, position the attached sling down between the camming rails, insert into the rock and then give the sling a good yank to "set" the unit. To add security to the placement you can locate the point of the unit in a small depression or place in opposition with another nut.