Tool for binding a band (4) around an object, having a lock mount (2) for a lock which secures the band ends, a band-tensioning device (5, 6) and, if appropriate, a band-tensioning-measuring device (10). Provided between the lock mount (2) and the band-tensioning device (5, 6) is a band-tensioning-measuring device (14) which deflects the band (4) laterally and establishes the relationship between the deflection and the force necessary for this purpose.