The Original IVANKO Super GripperDevelop a strong grip and powerful forearms with adjustable increments. Additional springs are available but, you probably won't need any. This, fully and easily adjustable grip and forearm, device will work all the muscles of the hands and forearms. Out of the box, the SUPER GRIPPER has forty increments of adjustable resistance using two beefy coil springs. More can be added. The SUPER GRIPPER solves the problem created by the big jumps of the non-adjustable grippers. Add some variation by using it in the 'conventional' or 'original' (remember the diagrams in the old mags?) holds - right side up or upside down. This is no ordinary gripper. The SUPER GRIPPER weighs two pounds. The sturdy diecast metal frame has a tough protective coating. The heavy wire tension springs are chrome plated. The overall design provides a virtual lifetime of maintenance free training. The range of easy, quick, adjustability means several workout partners can use the gripper consecutively, despite differences in grip level. You can adjust the load over a wide range quicker then you can add a pair of plates to a bar.