A monkey fist jig is a craft tool used to tie a monkey fist knot, which is used to make a decorative knot or to hold a rope handle. It is made up of a metal cylinder with a hole drilled through the center.
The nails are tapped in around the side of the cylinder in the shape of a hexagon. A dowel or a strap are inserted through the center of the cylinder and the monkey fist knot is tied around the dowel or strap. The final result is a monkey fist jig that can be used to create a variety of knots and handles for a variety of ropes.