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86 Type Square Hole Cutter for Junction Box Wall Mounting
86 Type Square Hole Cutter for Junction Box Wall Mounting
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Cut Perfect Square Holes for 86 Junction Boxes — Every Time
The 86 Type Square Hole Cutter is the go-to tool for electricians, contractors, and serious DIYers who need fast, clean, and precise square holes in concrete and brick walls. Engineered to fit all standard 86-type junction boxes, this heavy-duty punch drill bit eliminates the guesswork and the mess, completing each hole in a single pass.
Made in Mainland China.
Why Electricians Love This Tool
- ⚡ One-Pass Precision: Creates perfectly sized square holes for all standard 86 junction boxes in a single drilling motion — no chiseling, no extra cleanup.
- 💪 High-Strength Alloy Steel: Sharp, hardened teeth power through concrete and brick without chipping or dulling, even under heavy, repeated use.
- 🌀 Self-Clearing Chip Evacuation: Optimized flute design automatically clears dust and debris as you drill, preventing clogging and keeping your workflow smooth.
- 🔧 Universal Square Shank: Fits most standard hammer drills with a secure, no-slip fit. Quick to install and easy to use — suitable for beginners and pros alike.
- 📐 Clean, Neat Edges: Precision-cut holes require zero finishing work, saving you valuable time on every installation.
Product Specifications
| Material | High-Strength Alloy Steel |
| Color | Silver |
| Length | 185 mm (7.28 in) |
| Width | 85 mm (3.35 in) |
| Shank Type | Universal Square Shank |
| Compatible With | Standard 86-Type Junction Boxes |
| Quantity Options | 1 pc / 2 pcs |
| Package | 1 or 2 × Square Hole Cutter (no retail box) |
Note: Due to manual measurement, dimensions may vary by 0–2 cm. Color may differ slightly from screen to screen.
Perfect For
- Electrical junction box installations in concrete and brick walls
- Home renovation and electrical rough-in work
- Commercial and large-scale electrical contracting projects
- A practical, professional gift for electricians and tradespeople
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Electrical Safety Resource
Always follow safe electrical installation practices. For guidance on electrical safety standards, visit the OSHA Electrical Safety page.
Frequently Asked Questions
Q: What size junction box does this 86 type square hole cutter fit?
A: This square hole punch cutter is specifically designed for standard 86-type electrical junction boxes (approximately 85 mm × 85 mm). It creates a clean, precisely sized opening in one pass, making it ideal for any standard 86 box installation.
Q: What wall materials can this hole cutter work on?
A: The high-strength alloy steel construction and sharp hardened teeth allow this tool to cut through concrete, brick, and similar masonry surfaces effectively. It is designed for use with a standard hammer drill for best results.
Q: Does this square hole cutter fit my hammer drill?
A: Yes — the universal square shank is compatible with most standard hammer drills available on the market. Simply insert it into your drill chuck and tighten securely for a no-slip fit before use.
Q: How does the chip evacuation design help during drilling?
A: The optimized flute geometry channels dust and concrete debris away from the cutting zone automatically as you drill. This prevents clogging, reduces heat buildup, and keeps the bit cutting efficiently, even during extended use.
