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).
Key and Key ID. When you package a file, you use a key. A key is a piece of data used in the encryption algorithms that protect the content. There are two parts to each key: a license key seed and a key ID (often abbreviated as KID). The key ID is public, and is stored in the file header as a way to identify the key required to decrypt the file.