Compact and efficient swing cheeked pulley for hauling, simple tyroleans, and self rescue.
Carry one of these and two screwgate krabs with your basic SRT rig, and it is possible to create an effective pulley jammer system (as long as you know how to make it in the first place). Works best with the post 2013 model Petzl Basic.
Sealed ball bearings, so it has much of the efficiency of the bigger models (quoted as 91%). It is smaller than the Fixe too, small enough to carry unnoticed, until it is needed. Also works in conjunction with a Mini - or Pro traxion to make a very effective 2:1 hauling system, or a 3:1 Z rig.