Yes4All Metal Hand Grip Strengthener Forearm Strength, Six Resistance Level (100, 150, 200, 250, 300, 350 lbs) Ergonomically solid aluminium handles with knurled coating for a non-slip grip Four different strength levels for beginning, intermediate and advanced training (100 lbs-350lbs) Reasonable price and high quality Used for hand strength, stamina, rehab and injury prevention Perfect to increase massive forearm muscles, hand endurance and dexterity