Prohands Gripmaster Hand Exerciser, Finger Exerciser (Hand Grip Strengthener), Spring-Loaded, Finger-Piston System, Isolate and Exercise Each Finger, (9 lb Heavy Tension, Black-Gripmaster)
| Country | USA |
| Brand | Jones & Bartlett Learning |
| Manufacturer | Jones & Bartlett Learning |
| Binding | Paperback |
| ReleaseDate | 2012-04-20 |
| UnitCount | 1 |
| Format | Illustrated |
| EANs | 9780763781491 |