ESP Quick Change Heli-Clips, Quick Change Heli Clips are super strong and feature a smooth black finish. They are designed to run on the leader or mainline as part of a helicopter rig set up. The crook link allows quick change of any hook length which terminates in a loop it is best to slide a Streamliner Sleeve or section of silicone tube over the crook in use. For fish safety, the large diameter ring can pass freely over a leader knot. 10 per packet.