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86-Line Electrical Box Square Hole Cutter | Drill-Fit Manganese Steel Punch | Clean Square Cuts | For Drywall, Plasterboard & Wood | 86-Type Back Box | Electrician & DIY Tool

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Perfect Square Holes in One Pass — The 86-Line Electrical Box Square Hole Cutter

Cut clean, precise square holes for 86-type electrical back boxes in drywall, plasterboard and wood with this drill-compatible square hole punch. Fits any standard power drill chuck and cuts a complete square in a single smooth pass — no chiselling, no scoring, no tidying up the edges afterwards. Manganese steel construction keeps the cutting edge sharp through hundreds of cuts and resists the wear and deformation that affects cheaper steel punches within a few months of site use. An essential time-saver for electricians, first-fix tradespeople and serious DIYers fitting sockets, switches and back boxes in stud wall and timber frame construction. Weight: 0.45 kg.

Why You'll Love It

Fits any standard power drill for fast, one-pass square hole cutting — The drill-compatible shank fits directly into any standard power drill chuck without adapters, allowing the cutter to be deployed immediately from an existing tool kit — and the single-pass cutting action produces a complete square hole in one smooth motion rather than requiring multiple drill entry points, jigsaw cuts or chiselled corners that add time and produce rougher edges around the back box opening.
Engineered for 86-type electrical back boxes — the UK and EU standard size — The 86-line designation refers to the standard 86mm square electrical back box format used for wall sockets, light switches and data outlets across UK and European electrical installation — ensuring the cut opening matches the back box footprint precisely and produces a clean, professional finish around the socket or switch faceplate without visible gaps or remedial filler work.
Manganese steel cutting edge for long-lasting sharpness on site — Manganese steel maintains a sharper cutting edge under the repeated impact and friction of square hole punching through plasterboard and wood than standard carbon steel, resisting the edge blunting and corner deformation that makes cheaper punches progressively less effective after the first 20–30 cuts and requires early replacement on active installation projects.
Works on drywall, plasterboard, wood and similar sheet materials — The cutter handles the full range of stud wall and timber frame materials used in new build and renovation electrical first fix — from single-layer plasterboard on metal stud through to thicker timber noggins and OSB sheathing — without requiring a material-specific tool for each substrate type.
One-pass cut eliminates chiselling, tidying and finishing time — Unlike scoring-and-snapping or jigsaw methods that leave rough edges requiring additional finishing before the back box can be fitted flush, the punch produces a clean-edged square opening in a single drill pass that is ready for immediate back box installation — significantly reducing the time per outlet on large first-fix runs where multiplied over dozens of positions the time saving is substantial.