The latest design of our handheld pneumatic planishing hammer power head assembly. Easily change from hoop to hoop with our quick release mechanism. Comes with one upper die. Bend your own frame hoops from pipe or tubing, or purchase and adapt to others. The female receiver for the frames is 1.250". Features a tease trigger for excellent control of beats per minute. Please email if you have any questions or would like to purchase additional components such as lower dies or die holder for making your own frame hoops. Made in the US by Air Boss Tools