The Jonard Tools EBC-363 Low Voltage Electrical Wall Box Cutter easily cuts drywall to speed up installation of low voltage mounting brackets. It must be used with an oscillating multi-tool (sold separately) that fits most industry-standard power tools. Made of stamped steel, it boasts high durability and a long lifespan, and creates precise rectangular holes measuring 2 1/4" wide x 3 5/8" high for easy installation of single gang electrical boxes in drywall.