| Specification | Parameter (8x42) | Parameter (8x65) |
| Brand | DONGCHENG | DONGCHENG |
| Model / Part Identifier | DG MAGNETIC BIT HOLDER 8X42 | DG MAGNETIC BIT HOLDER 8X65 |
| Product Type | Magnetic Nut Setter / Screw Key | Magnetic Nut Setter / Screw Key |
| Socket / Hex Bore Size | 8 mm | 8 mm |
| Overall Length | 42 mm (Stubby / Compact) | 65 mm (Extended Reach) |
| Drive Shank Size | 1/4" (6.35 mm) Standard Hex | 1/4" (6.35 mm) Standard Hex |
| Material | Hardened Industrial Alloy Steel | Hardened Industrial Alloy Steel |
| Fastener Retention | Embedded Permanent Magnet | Embedded Permanent Magnet |
| Compatible Tools | Drills, Impact Drivers, Screwdrivers | Drills, Impact Drivers, Screwdrivers |
| Best Used For | Tight Enclosures, Stud Framing, Cladding | Deep Corrugated Roofing, Trusses, Solar Racks |
Dual-Length Operational Range (42mm & 65mm): Combines a compact 42mm stubby profile for rigid, tight-space driving with an extended 65mm shank to reach deep into corrugated profiles without surface contact.
High-Power Permanent Magnetic Core: Securely seats and stabilizes standard 8mm hex screws to prevent drops, wobbling, and crooked starts during fast-paced, one-handed installation.
Drop-Forged Hardened Alloy Steel: Heat-treated construction resists socket wall flaring, corner rounding, and torsional shearing under heavy drill and impact driver operation.
Precision-Broached 8mm Hex Recess: Ensures uniform contact with hex-head fasteners, self-tapping anchors, and tek screws to eliminate cam-out and uneven sealing washer compression.
Universal 1/4-Inch Hex Power Shank: Compatible with standard cordless drill chucks, quick-change impact drivers, and magnetic bit holders across construction sites in Nepal.