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).
Every database can have one master key. Database master key is a symmetric key used to protect the private keys of certificates and asymmetric keys present in the database. It uses Triple DES algorithm together with user-provided password to encrypt the keys.