GDF Assembly lube is a must have for the serious fisherman. The assembly lube makes using high quality tubing more practical, because it allows you to easily and quickly slide quality tubing over the eye of the hook, beads, and split rings. It can also be used when tying knots. When tying knots the friction caused from pulling the knot tight can weaken or break your line. By adding a small drop of assembly lube you can eliminate the damage caused from the friction. GDF assembly lube is non-petroleum based, safe, non-toxic, odorless, and it dries and falls off.