This is a set of two nice metal holding clips for 9-volt batteries. They can be mounted in various ways, including gluing, screwing or even pop-riveting if you enlarge the holes a bit. these hold a standard 9-volt battery in a flat alignment to that it takes up more room horizontally and less room vertically. These are great for cigar box amplifiers and other applications where you need to mount a 9-volt battery inside an enclosure. Screws are not included with this set.