4 resistance levels: 4 pieces (100, 150, 200, 250 lbs) handles that strengthen your forearm and grip. Our handles are the perfect way to build hand strength and improve your grip. As your hands get stronger, you will be to lift heavier weights. perfect workout equipment: grip strength trainer is perfect for forearm training, hand training, finger training. It is simple and efficient, then it helps strengthen your grip, relieve stress and increase endurance. perfect for those who want to develop and maintain strong, healthy hands. Portable and effective: thanks to the pocket size, you can take these handles with you and train anywhere. You can train the grip strength while you are in or even travelling. Crazy rope transforms your downtime into a productive workout session. HIGH QUALITY AND DURABILITY: Made of durable aluminum knurled handles and high-strength spring. The aluminium handles are strong yet , gentler for your hands while you are still doing a big workout. Colour:Black Material:Metal Package Contents: 1 * 50LB Hand Exercise Trainer 1 * 150LB Hand Exercise Trainer 1 * 200LB Hand Exercise Trainer 1 * 250LB Hand Exercise Trainer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.