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).
Instructions. Locate the number lock key on your keyboard. The number lock key is marked Num Lock or Num LK.. Depending on the brand and model of laptop and keyboard, the number lock key may be near the 10-key section or after the numbers in the number line toward the top of the keyboard.