QC swivels are designed for quick change of pre-ties without the need to cut nylon and re-tie knots.
Perfect for fishing with PVA sticks where the lead line has to be threaded through the stick and clipped onto the swivel - at the end just slip the bobber over the swivel to keep the system tidy.
Thanks to the special treatment, each swivel has a non-reflective matte black surface that does not scare the fish.