Abstract: An exercise device for exercising hand, wrist, arm, and upper body muscles having adjustable force resistance and a force setting indicator. The exercise device includes a housing, a first handle connected to one end of the housing, a second handle connected to the opposite end of the housing, an inner spring disposed inside the housing, and an outer spring disposed inside the housing. The outer spring is connected to the inner spring and encases the inner spring. An adjuster knob disposed on the second handle and coupled to the inner spring and configured to adjust a tension of the inner spring and compression of the outer spring.

Abstract: An exercise device for exercising hand, wrist, arm, and upper body muscles having adjustable force resistance and a force setting indicator. The exercise device includes a housing, a first handle connected to one end of the housing, a second handle connected to the opposite end of the housing, an inner spring disposed inside the housing, and an outer spring disposed inside the housing. The outer spring is connected to the inner spring and encases the inner spring. An adjuster knob disposed on the second handle and coupled to the inner spring and configured to adjust a tension of the inner spring and compression of the outer spring.

Abstract: The method of dental scaling of the invention uses a scaler and reservoir system, comprising: a scaler handpiece having a scaling tip, a scaler housing enclosing a scaler valve, a compressor housing enclosing a reservoir valve and a compressor, a reservoir housing having an inner chamber, the scaler housing is supported by the reservoir housing, and the compressor housing is supported by and connected to the scaler housing and the reservoir housing, the scaler handpiece is connected to the scaler housing, vibrates the tip, and scales a tooth in a patient'smooth by positioning the scaling tip adjacent to the tooth. Preferably the dental scaler and reservoir system, comprising: a scaler housing, a scaler valve, a compressor housing, a reservoir valve, a compressor, a reservoir housing having an inner chamber, a handpiece housing having a handpiece valve and a vibrational member. The scaler housing is supported by the reservoir housing. The compressor is connected to compressor conduit.