The Grillon (pronounced gri-yawn) is an adaptation of the popular GRIGRI belay device into an industrial-use safety lanyard. The smooth cam feeds line on command, yet locks when load is applied. As for comparison, the Grillon is about 20% larger in both size and weight (yet still quite small) to the Positioner and Cinch, yet is easy to take off-line for cleaning. Not compatible with wire-core ropes. Requires use of one carabiner (not included). Comes with a steel auto locking snap on one end. Fits ropes 11 to 13 mm. Not to be used for fall arrest.