Arrow Fastener Double Gang Box Cutter is cuts through drywall in seconds, making this the fastest and easiest tool to use for installing double gang electrical boxes. Highlights: Material: Steel Size: 4 Inch x 3-3/4 Inch Double Gang Box Cutter Constructed from stamped steel for long life and durability Cuts a hole 4 inch x 3-3/4 inch in drywall, perfect for installing old work double gang electrical boxes Compatible with most industry-standard oscillating multi-tools