Abstract: A security deposit mailbox that may be installed in a wall, door or other structure. A pivoting door allows items to be placed into an attached pan from which the items slide or fall through an opening when the door is closed. The pan prevents access to the opening when the door is opened. A secure storage container is provided for retaining the deposited mail when the deposit box and secure storage container are mounted in a wall or plinth. A framework that may be used in the installation, and methods of installation are also presented.

Abstract: A sealed collet having improved radial flexibility is provided for facilitating removal from a locknut of a chuck assembly. The sealed collet includes a collet body formed from a tubular configuration of elongated gripping fingers separated by elongated slots which render the body radially resilient in response to pressure applied by a locknut. The slots are filled with a bonding agent, which may be a silicon rubber compound, for preventing dirt and debris from entering the collet slots and for preventing pressurized coolant intended to flow through a bore in a tool shank from flowing through the walls of the collet body. To increase the radial compressibility of the collet, agent-free gaps are provided in the slots immediately behind a distal portion of the collet body. In the preferred embodiment, the length of the agent-free gap is between 20% and 30% of the overall length of its respective slot.