Features: The 86 type junction box slotting tool for square shanks electric hammer delivers rapid punches through capability, crafted from solid high carbon steel for professional grades drilling efficiency. Specifically suitable for standard 86 type switching box, this practical tool features accuracy engineered dimension for unseamed integration with mainstream electrical component. Ideal for electricians, plumbers, and renovations contractors requiring quick wall box installations during residential upgrades or commercial wiring projects. Perfect for creating clean openings in dry wall and concrete front during home improvement projects, electrical system upgrades, or industrial facility maintenance. Its ergonomic design minimizes operations fatigue during extended use, while the wear resistant cutting edges maintains keenness through repetitive drilling tasks. Specifications: Material: High Carbon Steel Size:Approx.192x86x45mm/7.68x3.35x1.77inches Package Includes: 1Pc High Carbon Steel Grooving Tool 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.