Contains: 8", 10" and 12" Hose Pinch Off Pliers Shuts-off flow through vacuum lines, fuel lines, coolant lines, etc. Ratchet mechanism holds pivoting jaws tightly in place Heavy-duty swivel jaws pivot to assure parallel pinching Max Openings: 8" - 1" Max Opening 10" - 1" Max Opening 12" - 1-3/8" Max Opening