The Tinius Olsen machine has been used primarily for testing concrete cylinders, structural steel members, and standard steel test specimens. The machine consists of a dual crosshead, mechanical screw ...

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Sony recommends a #1 Phillips or crosshead screwdriver, but this isn't rocket science ... Once you’ve got everything open, you’ll see a rectangular piece of metal with a screw holding it in place.

If you need to change a toy’s batteries, swap out a thermostat, or tighten those little screws on your sunglasses, you need a precision screwdriver. Of all the precision screwdrivers we’ve ...