Klein Tools MAG2 Demagnetizer / Magnetizer for Screwdriver B

The Verdict

If you’ve ever dropped a screw deep inside a wall cavity or fought to hold a stubborn fastener in place, you already know why the Klein Tools MAG2 exists. This little yellow pocket tool solves a genuinely annoying problem: keeping screws on your bit without resorting to magnetic bit holders that weaken with use. It’s a 4.7-star product on Amazon with 235 ratings, and after digging into how it performs, here’s the real story.

What you actually get
The MAG2 is a compact, cylindrical device about the size of a fat marker. It has a slot on top for inserting bits and screwdriver shafts, plus a small pocket clip on the side. The design is intentionally simple — no batteries, no electronics, no moving parts. You push the bit in, pull it out, and it’s magnetized. Flip it over to the other side, repeat, and it’s demagnetized. That’s the entire operation, and it takes less than five seconds.

How it performs in real use
The magic here is the internal rare-earth magnets positioned at different angles. When you insert a bit, the tool aligns the magnetic domains in the steel, creating a temporary charge. The demagnetizing side does the opposite, scrambling those domains so the bit loses its pull. It works on 1/4-inch hex bits, Phillips and flathead tips, and even small screwdrivers with shafts up to roughly 5/16-inch diameter.

In practice, the magnetization is solid but not overpowering. A #2 Phillips bit will hold a drywall screw or a #8 wood screw firmly enough to start threading without wobble. It won’t hold a heavy 3-inch lag bolt — that’s not what this is for. The demagnetizing function is the sleeper feature. If you work on electronics or precision assemblies, being able to strip magnetism from a bit instantly is a lifesaver. One reviewer put it plainly: “I use the demag side more than the mag side. It saves me from chasing screws around on circuit boards.”

What buyers consistently praise
The durability and simplicity get the most love. Multiple owners note they’ve had the MAG2 for years, tossed it in a toolbox, and it still works exactly like day one. There’s nothing to wear out. The pocket clip is also a genuine plus — it clips onto a work apron or belt loop, so it’s always within reach. Another common compliment is speed: “No more fumbling with magnetic trays or trying to magnetize a screwdriver by rubbing it on a speaker magnet. This just works.” At its price point, most buyers feel it’s a no-brainer addition to any kit.

Where it falls short
Let’s be honest about limitations. The MAG2 only handles small bits and short screwdriver shafts. If you’re trying to magnetize a full-size 6-inch flathead, it won’t fit. The magnetization strength is also moderate — it’s designed for light-duty work, not industrial-grade holding. Some users report that the effect fades after a few hours of heavy use, so you’ll need to reapply the charge periodically. Finally, the plastic body feels a bit lightweight; it’s durable enough for a toolbox, but don’t expect it to survive being run over by a truck.

Who should buy this
This is for electricians, HVAC techs, appliance repair folks, and DIYers who work with small screws daily. If you install outlets, assemble furniture, or swap out computer components, the MAG2 will save you time and frustration. It’s also a great gift for a new homeowner who’s just starting a basic tool collection. Skip it if you only work with large-diameter fasteners or long screwdrivers — you’ll need a different solution.

FAQ
Does it work on all screwdriver sizes?
No. It handles bits up to 1/4-inch hex and screwdriver shafts up to about 5/16-inch diameter. Larger tools won’t fit.

How long does the magnetization last?
It varies by use. For light work, expect it to hold for several hours. Heavy driving may require recharging the bit every few uses.

Can it damage electronics?
The magnetic field is localized and weak enough that it won’t harm most electronics, but it’s still smart to demagnetize bits before working near sensitive components.

The Verdict
The Klein Tools MAG2 is a small tool that solves a real problem with zero fuss. It’s affordable, durable, and genuinely useful for anyone who handles screws regularly. The limitations are real but minor — it’s not for heavy-duty work or oversized tools, and the magnetization isn’t permanent. But for what it does, it does it well.

Buy it if you work with small bits and screws and want a pocket-sized solution that never needs batteries.
Skip it if you only use large screwdrivers or need industrial-strength magnetism.

Rating: 4.6/5 — a practical, reliable gadget that earns its place in any toolbox.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.