BUILD STRENGTH AND DEXTERITY – Develop and maintain strength and dexterity in your fingers, hands and forearms. The ergonomic design and over molded finger pads and grip help make your conditioning workouts comfortable CUSTOMIZED TENSION - Varigrip allows you to adjust and customize the tension for each finger so you can strengthen individual fingers and prevent favoring certain fingers SIMULATED STRINGS- By removing the reversible molded grip you can uncover a simulated string that helps develop and maintain finger calluses for string musicians ON-THE-GO CONDITIONING – Varigrip is the ultimate portable workout. At the office, at home or on the train, you can keep up your finger, hand and forearm strength and coordination D’ADDARIO ACCESSORIES - For over 20 years, D’Addario Accessories (formerly Planet Waves) has been leading the industry in innovative and problem-solving products that serve musicians worldwide.