Tool for securing a loop-type band clamp around an object. Turning a drive screw displaces an upper jaw relative to a lower jaw of the tool. An alignment component is inserted through holes in band clamp tabs and then a fastener engages a receiving end of the alignment component. An opening in the lower jaw receives the fastener and an opening in the upper jaw receives an upper segment the alignment component. The upper and lower jaws compress the tabs by operation of the drive screw, closing the loop around the object. While the tabs are compressed, the alignment component is separated from the fastener and a clamp fastener is inserted through the tab holes and mated with the fastener. The upper segment of the alignment component is removed from the upper jaw. The upper and lower jaws are removed from the band clamp by operation of the drive screw.