The FastCap Joist Clip is an amazing new hands free joist hanger tool for the contractor or home owner for installing joist hangers. The tool holds the joist hanger in place leaving the hands free to nail. Simply hold the joist hanger in position over a joist or stub block and slide the tool over the hanger. The HangerPal tool exerts a squeezing force that holds the joist hanger in place. Both hands are now free to use a pneumatic hardware fastener or hammer and nail.