Round conveyer welding pliers is a special tools to weld different sizes of round conveyer belt.Before operating loose handle fix screw and platen screw on welding pliers first,then put both end of round conveyer belt into its V-slot(see fig.2) and close the both platens and fasten the four screws on it(for small conveyer belt only need to fasten four screws in the middle),then put 150W electric iron between the two interfaces of round conveyer belt at the same time heat it(see fig.3).After finish heating,take out electric iron clamp handle and fix it with handle fix screws(see fig.4) and wait for about 15 minutes.