Theres a guy on WSF forum (forget his handle, but put a post up about the small leads and he should reply)
he does grip leads in 4oz, 3oz, 2oz and even 1oz
and they are spot on
charged about 30 p each if i remember right
We use them a lot down her eon the humber flounder matches in the smaller sizes
we use very light gear (6lb line, quiver tip rods, 1oz leads etc for flounder, scoolie fishing to maximise the fun factor) and on the ebb tide it tends to run a little to hard.
rather than chuck out a big rod which would totally over gun the fish, a light gripper is used to hold in place, but the wires must be set very light as to trip out on the retrive with a quiver tip rod, u willbe surprised how affective it is.
mack