Following are examples of three metamorphic rocks and a list of their uses. Marble is a metamorphic rock that is used to make floor tiles, counter tops and it is carved into statues and was used extensively in the building of the Roman Colosseum and other historic buildings. Slate is another metamâ¦.
A hex key, Allen key or Allen wrench is a tool of hexagonal cross-section used to drive bolts and screws that have a hexagonal socket in the head (internal-wrenching hexagon drive).
Num Lock is a key on the numeric keypad of most keyboards, used to switch that pad between number entry and arrow keys.It is a toggle key, like Caps Lock and Scroll Lock. Its state is usually represented by a light on the keyboard.est Answer: Num Lock is the button you use if you want to use the number keys at the side of your keyboard. Press it once t activate them and once again to knock it off.