Metal Heavy Strength Exercise Gripper Hand Grippers Grip Forearm Wrist Grips lbs Description: This Super Heavy Duty Hand Gripper is the best available piece of equipment to help you strenghten your grip power! They are available in 5 different resistance levels (pounds pressure) including; 100LBS, 150LBS, 200LBS, 250LBS, 300LBS. Yo can now train your grip and gain measurable grip strength by increasing the resistance with this great heavy duty hand grippers. They feature super durable steels springs and knurled aluminum handles for a lifetime of use. For your purchase please select weight value accordingly, for example if you are just starting you can start with 100Lbs of gripping resistance, and as you advance, you can proceed to the next level. Intensity： 100 pounds (=45KG seldom exercise people. Adult men or Underage male) 150 pounds (=68KG exercise often need to strengthen professional training for 1 years) 200 pounds =90KG (2-4 professional training--Men who are strong enough to exercise.) 250 pounds =113KG (3-5 professional training--People who are strong enough to exercise regularly can choose.) 300 pounds =138KG (Professional Powerful fitness instructor optional 350 pound =158KG the average person is grip (Optional for  Features: The main purpose: to exercise the muscles of forearm wrist grip wrench climbing climbing strength badminton table tennis basketball weightlifting school examination and so on a series of training. Recommended that the number of pounds to use the right hand is different. Heavy Grips Hand Exercisers - Hand Grippers for Beginners to the Most Seasoned Professionals The Heavy Grips hand gripper series was developed for athletes who want to take the training of their grip strength to the next level.  These high quality aluminum-handled hand-grippers are crafted with 100 inch-force-lb torque increments from 100lbs to 350lbs so that you can train your grip similar to training any other bodypart-- by increasing resistance. This will finally allow you to build the huge forearms and crushing grip you have been unable to achieve by doing endless reps with plastic-handled hand-grippers. Available in 5 different resistance levels (pounds pressure) including; 100LBS, 150LBS, 200LBS, 250LBS, 300LBS, and 350LBS. Please choose from product options. Specifications: Material:High Carbon Steel Spring + Aluminum Alloy Handle Condition: 100% Brand New Style:Grip Strength Trainer Color:Black/Blue/White/Red Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 1-3cm measuring deviation due to manual measurement. Package included: Heavy Duty Hand Gripper