A casing for storing and presenting documents is disclosed which has two sheets of foil of different length joined together along three edges and a top edge joint which creates a protective flap. In certain aspects, the at least two phases are optically or visually distinct from one another. This will provide an alarm when the buckle is being inadvertently released. The cutting structures may be oriented such that the defined axis is neither coplanar with, nor parallel to, an intended rotational path of the at least one discrete cutting structure during operation of the bit. The active snubber circuit is in parallel circuit with the motor between the diode and the electrical motor.