The simplest way to open the majority of pin locks is to insert a key (or variety of keys) that have been cut so that each peak of the key is equal and has been cut down to the lowest groove of the key. This key is then struck sharply with a hammer whilst applying torque. The force of the blow is carried down the length of the key and (operating as does a Newton's cradle) will move only the driver pins leaving the key pins in place. If done correctly this briefly creates a gap around the shear line allowing the plug to rotate freely. Some modern high security locks include bumping protection, such as Master Lock's "BumpStop" and Ilco's "Bump Halt" technology.