Assemble your next hose end in a matter of minutes with the help of the all new Redhorse Performance Assembly Tool. We know it looks a little unusual, but this handy tool has been our internal secret weapon for years. Invented in-house to help our own employees quickly and reliably assemble scratch-free lines, the Redhorse Performance assembly tool will save you LOTS of time. The Redhorse Performance Assembly tool comes with an adjustable die and works for all Redhorse Performance hose ends -04 through -16.