The Accurate 4″ knot puller is a great tool to cinch your knots tight without the risk of injuring your hands. It consists of two pieces that screw together to be compact to fit in a pocket or tackle box. There is a hole at the top for a key ring and a slot that can be used to put a hook through for cinching down knots at that location. For line connections, the two pieces of the knot puller have a black rubber coating for ease of holding while cinching down knots and to give something for the line to “bite in to.