These steel-washers-cum-screwdrivers look like they'd be mighty handy!
This innocent-looking 1" dia. flat steel bagel is really a very versatile pocket screwdriver. What makes it so effective is the range of edge thickness (from 0.030" to 0.090") created by a ramp formed on one side.
It replaces dimes, quarters and table knives, all of which have width and strength limitations. We sell them by the dozen because they make excellent gifts, particularly to those whom you want to discourage from using cutlery for household repairs.
(via Make)
