For small or round contact surfaces, closure seals must be used; however, with flat package surfaces, sealing without closures is also possible. Round strapping devices are available both as combination units and as separate tensioners and sealers. In the following overview, we have listed the devices in each of the three categories that offer the best price-performance ratio, in our opinion. We are, of course, happy to provide additional devices upon request. The variety of steel strapping tools can best be classified along the criteria of "drive type" and "contact surface":
Drive type: manual vs. pneumatic
Contact surface: flat vs. round
