Abstract: A dry sprinkler head which comprises a fail safe seat, and is fully adjustable.

Abstract: A hole saw having efficient slug removal preferably includes a saw cup, a shank portion and a pilot cutting device. A cutting surface is formed on an open end of the saw cup. The inside surface, outside surface and cutting surface of the saw cup are given a low friction treatment. A fluoropolymer resin coating is used for the low friction treatment. The friction treatment is applied by spraying thereof on the saw cup. The saw cup is then heated to a predetermined temperature for a set period of time. The low friction treatment is cured when the saw cup is used. The shank portion is attached to a closed end of the saw cup with any suitable fastening process. The shank portion preferably retains the pilot cutting device.

Abstract: A hole saw having depth of travel indicia includes a hole saw with indica marks formed on an outer diameter thereof. The indica marks are preferably formed in the outer diameter of the hole saw with any suitable process. The indica mark preferably is formed perpendicular to the center axis of the hole saw. The indicia mark could continue around the entire outer diameter or have a set length. The location of each indicia mark is a set dimension from tips of the cutting teeth of the hole saw. A dimension is preferably stamped adjacent each indicia mark to indicate the distance from each indicia mark to the tips of the cutting teeth.

Abstract: A pair of pants with an inflatable bladder preferably includes a pair of pants and an inflatable bladder. The inflatable bladder is contained within the waist area of the pair of pants. The inflatable bladder includes a valve housing and a check valve. A finger pump or a separate hand pump is used to force air through the valve housing into the inflatable bladder. The check valve does not allow the air to escape the inflatable bladder. A belt with an inflatable bladder preferably includes a belt and an inflatable bladder. The inflatable bladder is attached to an inner perimeter of the belt with any suitable method. A finger pump or a separate hand pump is used to force air through the valve housing into the inflatable bladder.