The Malco" TurboCrimper IMPACT is a simple, compact accessory that works exclusively with the power assistance of impact driver technology to safely and efficiently crimp 30 to 24 ga (0.41 to o.71 mm) galvanized round duct and (0.31 to 0.61 mm) black stove pipe. The TurboCrimper IMPACT does not require set-up or adjustment. Just chuck the 1/4 in power groove drive shaft to your cordless or corded (Min.12 Volt DC / Max. 7 Amp AC) impact driver to immediately begin crimping multiple sizes, types and thickness of pipe and duct, including spiral duct, fast and easy. With the pipe or duct seam in closed position, start the crimp to one side of the seam by gently tugging on the driver trigger and angling the TurboCrimper IMPACT onto the metal edge. Walk the crimper around the pipe circumference in a controlled manner and then angle the crimper off the metal as the crimper approaches the other side of the seam. The TurboCrimper IMPACT is five times faster than a manual crimping tool based on actual field trials! It is comfortable for any operator to maneuver and, lefties take note, it works with the impact driver in forward or reverse. The handy little TurboCrimper IMPACT is a must-have accessory for every HVAC installer and easily stores in a ready tool pouch or bag when not in use.