Commonly used in sea fishing, simply pass line through the centre and quickly attach lead to the snap for an easy running legder rig. Classic Design. With tough plastic and super strong steel clip. Booms are great for avoiding tangles and this simple sliding boom with clip link for the lead is great for a running ledger rig. A small but tough boom which can be used from the boat or from the shore. A simple sliding boom with clip link for the lead and great for a running ledger rig.