Product Parameters: Material: Aluminum AlloyColor: Silver, BlackSize: 10.5 x 13.5 x 2.5 cmResistance: 100lb/150lb/200lb/250lb/300lb Package Includes: 1 Piece Hand Gripper Strengthener Product Description: Break Through Your Physical Limits - As most athletes know, you need to train your weakest link. But there's a difference between knowing it and "DOING IT". If you want to take your powerlifting or other strength traits to the next level, this is where you'll succeed, training your grip.Designed to Increase Your Grip Strength - There's nothing in a typical gym that compares to these hand grippers. Just think about it. Almost every piece of equipment you touch wasn't created just to isolate your forearms, fingers and wrists. As a result, there's no chance they'll be as effective as these grip strengtheners.Hand Exercises on the Go - Unlike most training exercises, you can do these exercises just about anywhere. You can use these while you're at the office or even in the car when you travel for work. They're basically a discreet training tool that turns your work and downtime into productive workouts.Create Hands of Steel - Just like in life, you need to be comfortable being uncomfortable. We mention this because our grips weren't built for dainty little hands. They were designed to toughen you up and that's how finger exercises need to be. Trust us, your hands will get used to it and you'll thank you afterward.The perfect progression - no matter where you start and how strong you want to become, there's always room to grow. to help you challenge yourself physically.