Abstract: An adjustable pole comprising an upper pole telescopically engaged with a lower pole. The adjustable pole further comprises a locking unit secured to an upper end of the lower pole. The locking unit comprises a housing having a lower bore engaged with the upper end of the lower pole. The housing further comprises an upper bore disposed above the lower bore for freely receiving the upper pole into and out of the lower pole. The housing further comprises a channel disposed adjacent the upper bore. The locking unit further comprises a lever rotatably supported within the channel between a locked position where the upper pole cannot move relative to the lower pole and an unlocked position where the upper pole may be moved. The lever comprises a tooth catch engaged with the upper pole and substantially shielded by the channel between the locked and unlocked positions.

Abstract: An improved dust containment system comprising a flexible sheeting supported by one or more poles. The flexible sheeting being held in place on the pole by one or more clamps. The clamps have a pair of handles that pivot about an axis and wherein opposite the handles are two jaws. Each jaw has a body area and a tip. The jaws being connected to their respective handles so that the tips of the jaws contact each other and wherein the body areas of the respective jaws are configured so that the body area of the jaws can fit around the pole without separating the tips of the jaws.