Features: Engineered with high strength steel, this square/round hole punching delivers precise and efficient cutting for 86 type junction box, reducing installation time by 50% while maintaining exceptional durability against wear. Suitable for most drill, antislip handles for secure grip, and drill bit that extend tool life by compared to standard cutters. Ideal for electricians, construction professional and enthusiasts requiring for electrical box installations in residential or commercial projects. Perfect for creating clean rectangular slots in wall, wood, or concrete wall during wiring upgrades, outlet installations, or requiring millimeter level accuracy. The integrated centering tip ensuring alignment, making it " rectangle socket slot cutter" for flawlessly finished electrical systems in diverse building environment. Specifications: Component: Steel Type:Round/Square Round: Approx.8.6x19cm/3.39x7.48inch Square: Approx.8.6x15cm/3.39x5.91inch Package Includes: 1Pc Hole Cutter note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.