How to Magnetize a Screwdriver Permanently? | Methods That Last

Whether you can magnetize a screwdriver at all comes down to one thing: the shaft’s composition. Only ferromagnetic steel—metal containing iron, nickel, cobalt, or a rare-earth element like gadolinium—will hold a charge. A quick test: if a fridge magnet sticks to the shaft, the method will work. If not, no technique will help. For everyone else, the three reliable routes are a strong permanent magnet, a purpose-built magnetizer block, or a low-voltage coil. Each takes under a minute and produces a charge that lasts roughly 3 months before it fades.

Stroking With a Strong Magnet

The simplest field-tested method uses any strong magnet with at least 1/4 to 1 pound of pull force. A neodymium bar or ring magnet works best for this. Clean the shaft first—dirt and grease will block the alignment of the metal’s internal magnetic domains.

Stroke the magnet from the handle toward the tip in one direction only, applying firm, consistent pressure. After each pass, rotate the screwdriver a quarter turn and repeat. Continue until you’ve completed a full rotation, aiming for 20 to 30 total strokes for good saturation.

Never rub the magnet back and forth. Moving it in two directions actively disrupts the aligned domains you’re trying to build, and multiple sources confirm this can cancel or significantly weaken the charge. One smooth direction, every time.

A quick retouch with the magnet restores it.

Using a Magnetizer/Demagnetizer Block

Purpose-built magnetizer blocks are the most straightforward official-product method, and they’re designed specifically for screwdriver tips and shafts. Bosch Professional’s PRO Magnetizer/Demagnetizer, for example, instantly magnetizes or demagnetizes a screwdriver by passing it through the correct slot—one marked for charging, the other for neutralizing.

Klein Tools gives similar instructions: insert the shaft fully into the magnetizing slot, then draw it out slowly without rotating. Unior’s block works the same way—push the tip and shaft through the opening marked “+” to magnetize the tip immediately. Apex Magnets notes its compact version can magnetize small precision tools either temporarily or permanently, depending on how the tool is passed through.

These blocks run a few dollars to about twenty, and if you work with tools regularly, the convenience justifies the cost. A magnetic screwdriver set with a built-in magnetizer eliminates the separate purchase entirely—the charging slot lives in the handle or case.

Coil Method With a Battery

For a powered approach, wrap insulated copper wire tightly around the shaft to form a coil, leaving loose ends. Connect those ends momentarily to a low-voltage DC source like a 9-volt or AA battery for 15 to 30 seconds, then disconnect.

A common variant uses a 6V or 9V battery with 10 to 20 wire wraps, then waits 30 to 60 seconds before disconnecting. Keep the current flow short—one source explicitly warns of shock hazard when improvising with a car battery, so stick to small batteries and brief bursts only. This method produces a strong charge but carries more setup risk than the magnet approaches above.

How to Demagnetize a Screwdriver

Reverse the process to remove the charge. With the stroking method, drag the magnet from tip back toward the handle—the opposite direction from magnetizing—for roughly the same number of passes. With a magnetizer block, pass the shaft through the slot marked “−” or the demagnetizing opening. Klein Tools and Bosch both design their blocks with separate slots for each function, so the operation is identical either way.

You might want to demagnetize to stop screws from sticking to the shaft, or because the tool is picking up metal shavings in a precision workspace. Either technique clears the charge in seconds.

FAQs