The corner block lets you change the line pull direction of a log to avoid obstacles or to position it parallel to the trail. The corner block is therefore very useful with an ATV (QUAD) or our Portable Winch to get some lift on the rope or to double your line (and power). Use it with the pulley facing down for best results since it will prevent the rope from jumping out of the block when there is a slack and will jump easier of it when used in combination with the automatic release (PCA-1291). Automatic release (078017) is not included.