Do these Multitool SQUARE HOLE cutters work? - Triton Tools Single and Dual back box cutters - YouTube
Triton Multi Tool Socket Double Electric Back Box Cutter 358057 | Sealants and Tools Direct
Square Socket Box Cutter - SMART Tool Group | Are you new to box cutters? Learn how to cut an electrical back box hole in a matter of seconds with the SMART
Multi-Tool Socket Box Cutter - Single / Double Back Box Cutter
Triton Multi-Tool Box Cutter - Single Gang | eBay
Multi-Tool Box Cutter Blade For Fitting Single/Twin-Gang Dry-Lining Metal Boxes | eBay
Triton Multi-Tool Box Cutter Single Gang (329184) : Amazon.co.uk: DIY & Tools