A combination of Keyhole Saw Blade and 12.5mm Snap-Off Blade is all needed. The 1.25mm-thick pointed saw blade makes a hole in a dry wall and cuts a wood, while cutter exposes a hard wiring and cuts a cardboard. The saw blade is bi-directional, works as a pull-saw as well as a push-saw. Its sharp-pointed tip drills a hole in a board to start cutting.
The utility snap-off blade cutter is placed in the deep part of the body to avoid unexpected touching while using the saw on the other side. The hard-to-bend 12.5mm-wide x 0.45mm thick snap-off blade cuts tough materials stronger than people expect from its compact appearance. For electrical insulation work, construction site, DIY project.