Easy to use Ratchet drive can be switched to use either the 3/8" wide or 5/8" wide slots of this pocket style tool. Installs 3/8" wide Center Punch Clamps in both 13/16" diameter and 1 3/8" diameter. Installs 5/8" wide Center Punch Clamps ranging from 1" diameter to 8" diameter. Easy ratchet action allows the installer to work on a bench or wherever the hose is placed. Compact size fits great in tool box for storage.