I can't remember the exact details, but the person needing a magnet to "fish" for his knife should check this out:

http://www.goldmine-elec-products.com

Item number is G1692. 30 pound pull magnet for $2.95. I have used these folks many times and have never been dissapointed.
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Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, a critter that can be killed but can't be tamed. --Robert A. Heinlein