Manual strapping tools, specifically a tensioner (left, in plastic) and a sealer or crimper (right). These tools are used together to secure plastic or metal banding around boxes or pallets for shipping and packaging purposes.
Strapping Sealer/Crimper: The black, plier-like tool on the right is a manual crimper, which is used with metal clips (seals) to securely crimp the ends of the strapping band together, creating a strong, permanent seal.
Strapping Tensioner: The blue tool partially inside the plastic bag on the left is a strapping tensioner. This device is used to tighten the strapping around an object before it is sealed.
These tools are widely available from industrial and packaging suppliers.