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).
Whether youâre reaching down into an engine or stretching behind a hard-to-move appliance, a handy Allen wrench set can help take the stress out of difficult repairs. Hexagonal bolts are a common fastener for automobile parts, furniture and household appliances. A hex key makes tightening and untightening them easy. No portable toolbox is complete without a compact Allen wrench set. The L-shaped design allows you to access hard-to-reach bolts and screws or add a little extra torque for a tough job. Upgrade your arsenal of tools with a hex key set from Sears.