The Jonard Tools EBC-400 Electrical Wall Box Cutter is designed for cutting single gang boxes in drywall for installing old work boxes. The electrical wall box cutter features the following:

Easily cuts drywall in just seconds to make installation of electrical boxes quick and easy
Needs to be used with an oscillating multi-tool (sold separately), fits most industry-standard multi-tool power tools
Can be used for installation of plastic, metal, or low voltage existing construction electrical boxes
Made of stamped steel for high durability and long life
Cuts a rectangular hole with dimensions: 2 3/8- wide x 3 3/4- high