5Pcs Magnetic Nut Drivers - Long (12mm)

At this size a nut driver starts overlapping with a socket and a ratchet, and it is worth being clear about when each is right. A ratchet gives you more torque and better feel, and it is the tool for a fastener that has to be tightened to a figure or that may be seized. A nut driver in a power driver gives you speed and one-handed working, and it is the tool for a run of forty screws that all need the same treatment. Choosing by the job rather than by habit saves both time and damaged heads.

The magnet is what makes the power driver approach practical: it holds the screw on the driver so you can place and start it with one hand, which on overhead and ladder work is not a convenience but a requirement.

These are the long pattern, giving reach past flanges, ribs and corners that a short socket cannot clear.

The material is high grade Cr-V, hardened and tempered — chromium for the hardness and wear resistance that keeps the internal hex corners sharp under the higher torque this size sees, vanadium for the toughness that stops a socket splitting.

Five per pack.

The buyers are roofing and cladding contractors, steel framing and drylining contractors, HVAC and ducting installers, machinery and equipment fitters, sheet metal fabricators, and hardware dealers supplying construction and installation trades.

Two habits. Seat the socket fully before applying power, because at this size the torque is high enough to round a head quickly if only the tips of the hex are engaged. And set the clutch on a drill-driver rather than relying on feel — a self-drilling screw that keeps turning after it has clamped will strip its own thread in thin sheet, and there is no warning. Ask us on WhatsApp for a price.