Use Reflex Putty for hand and forearm strengthening without the greasy or sticky feeling of other putties. Features Only Reflex Putty can be squeezed like traditional putty for hand strengthening AND pulled like exercise bands for full arm strengthening. Three resistance levels - choose one or all three for a progressive resistive hand exercise program. Great for improving grip strength. Medium and heavy resistance are particularly good for improving grip for athletic activities such as tennis, raquetball, squash, baseball, fencing or climbing and others. Each container has a full 90cc of putty - nearly twice as much as most putty containers. Includes exercise suggestions.