The tool is designed to seal standard tensile steel strapping. For steel strapping sizes 3/8" x 0.015" (10mm x 0.38mm) to 3/4" x 0.028" (19mm x 0.71mm), self-weight 10 lbs(4.5kgs) ? These portable tools are designed for either horizontal or vertical strapping of concrete products, crates, lumber, metal products, palletized products as well as other products to be unitized with steel strapping. ? No Seals Required. It seals, tightens and cuts steel strapping quickly & easily and economically. ? The accurate design provides better seal joint efficiency, while at the same time requiring 20% less effort compared with other similar tools. ? Equipped with reverse locking system designed for the most demanding applications. It provides added protection against the loosening or unlocking of the sealless connection in either direction.