Magnetizing Screwdrivers: Do the Cycles Wear Out?
If you magnetize a screwdriver over and over for years, does the tool eventually wear out? Daniel wrote in with that exact question, plus a practical problem: his magnetizing block won't fit a flexible drill shaft. This episode covers the three categories of magnetizing tools on the market — the block, the telescopic wand, and the powered electronic unit — how to tell a good block from a lousy one, what the demagnetization pass is actually for, and why soft magnetic steel can be cycled indefinitely without degrading. Along the way: why the same neodymium magnets that make these tools work are…
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