Compression-resistant device for the formation of calluses and finger strength

A compression-resistant device comprising:

• at least one pair of first and second opposing jaw members,
• the first and second opposing jaw members having respective engaging surfaces associated therewith, said first and second jaw members adapted for relative movement of the engaging surfaces between an open position configured to receive an object and a closed position configured to engage the object between the engaging surfaces,
• at least one of the first and second opposing jaw members having a manual compression surface configured to enable a user to manually apply pressure to urge the engaging surfaces from one of the closed position towards an open position or from the open position towards the closed position;
• and
• at least one resistance member configured and disposed to interface with the first and second opposing jaw members to resist pressure manually applied by a user urging the engaging surfaces from the closed position towards the open position or from the open position towards the closed position, the manual compression surface of the at least one of the first and second jaw members including projections extending therefrom and intermittent gaps therebetween such that the manually applied pressure forms an aggravated area on a finger surface of the user, the aggravated area a precursor to formation of at least one callus on the finger surface of the user upon repetitive pressure manually applied by the user urging the engaging surfaces from the closed position towards the open position or from the open position towards the closed position.