Over the years i have used many lead systems. Most of the time the pendulum and discharge clip does the job. But sometimes a change makes all the difference. The problem at this time of year is the weed, especially in gravel pits. You might be fishing a clear area but the weed will not be far away. Have a fish run into that with a heavy pendulum setup on and you will get snagged. So you need it to discharge, which the pendulum does well. However a flat pear is better sometimes for weed fishing because the lead lifts off the deck far quicker and can be brought to the surface with ease. You can then literally skim it across the surface over the weed. The one pictured is designed to discharge when it is snagged in heavy weed or when the fish shakes its head.