Check the listing for details. GRAINGER APPROVED 3CUN7 Strapping Tensioner,Manual,Regular Duty 3CUN7. Condition: New. Listed at 164.99 USD. Strapping Tensioner, Tool Power Source Manual, Tool Strength Standard Duty, Fits Strap Width 1/2 in to 3/4 in, Fits Strap Tensile 890 to 2025 lb, Handle Length 11 1/2 in, Tool Weight 7 lb, Tool Tension Capacity 2,025 lb, Tool Style Feedwheel, Tensioner Application Regular Duty, Min. Strapping Width 1/2 in, Max. Strapping Width 3/4 in, Overall Height 6 in, Tensioner Type Feedwheel Tensioner Manual tensioners for steel strapping can be brought to the work location and do not require an external power source or attachments. They are used for low-volume applications or where access to a power source is limited. The operator pushes a lever to tighten straps before a seal is applied using a sealing tool.Tensioner tools for steel strapping pull the ends of the strapping to secure the strap around.