Check the listing for details. GRAINGER APPROVED 3CUP2 Strapping Sealer,Manual,Heavy Duty 3CUP2. Condition: New. Listed at 71.41 USD. Strapping Sealer, Tool Power Source Manual, Tool Strength Heavy Duty, Tool Action Front Action, Fits Strap Width 3/4 in, Fits Strap Tensile 3205 lb, Tool Seal Type Open Seals, Tool Joint Type Double Down Notch, Handle Length 11 in, Tool Weight 2 lb, Tool Tension Capacity 3,205 lb, Tool Style Front Action, Tensioner Application Regular Duty, Min. Strapping Width 3/4 in, Max. Strapping Width 3/4 in, Overall Height 2 in, Compatible Seal Type Open Seals Manually-operated sealers for steel strapping are used for low-volume applications or where access to an external power source is limited. They can be carried to the work location. The operator squeezes a lever to crimp and press the seal in place.Sealer tools for steel strapping crimp and secure strapping seals for steel and zinc-coated steel.