Abstract: A device for tightening a collar clamp around an elongated member. The device includes a pair of pivoted arms having distal portions on one side of a pivot axis and, on the other side, handles resiliently urged away from each other. A pawl, pivoted perpendicularly to the arms' pivot axis and disposed in the distal portion of one arm, engages and pulls the collar tongue through an opening in the second arm when the handles are squeezed together. A third arm mounted remotely from the distal portions of the arms actuates a blade to sever the collar tongue once the collar has been tightened sufficiently.