The automatic release for open face corner block (PCA-1270) fits ropes up to 13 mm diameter. This is the perfect device for people pulling logs with an all terrain vehicle (QUAD - ATV - SIDE-BY-SIDE). An ingenious device for releasing the rope from the pulley to allow a log to ‘turn’ into the trail. Depending on the distance the anchor tree is from the trail, you may adjust the automatic tripper to make the rope slip out of the pulley at the appropriate moment. Simply turn the chain link one-half turn around the rope and insert it into the metal cartridge. Ideal to use with when you don’t want to stop in the middle of the operation. Download the instructions below to know more about this great little product!