The product is a set of four new 9-volt square batteries being offered for the same price as a single standard 9-volt battery. This could be a competitive advantage for customers looking for a cost-effective solution for their workholding needs. With the same voltage and compact square shape, these batteries could be suitable for a variety of industrial applications requiring reliable power sources. The seller is positioning this product as a convenient and affordable option for those in need of workholding solutions.