Measures tip, key and palmar pinch strength of healthy hands. Results are consistent with the published Mathiowetz studies. Indicator remains at the subjectís maximum reading until reset. Strength readings are in pounds and kilograms. Lightweight anodized aluminum with wrist strap. Includes carrying case and one year warranty. 30 lb gauge comes in blue, 60lb gauge comes in red. Part numbers 43052 for 30 lb and 43053 for 60 lb.