A simple knot toolNail knots aren&';t tested often, but when they are there is a lot on the line. It is worth getting it right, but best to avoid spending all afternoon cursing and trying to find a substitute for a solid knot tool. The Ergo Knot Tool makes nail knots easy and comes with clear instructions on how they are to be tied. -Ergonomic design-Quickly ties nail knots-Instructions included