Hand Trainer - Improve the strength of your hands, fingers, wrists and forearms, improve the grip strength of your hands and fingers, endurance, agility, muscle tone and fine and gross motor skills. Adjustable Resistance - With a rotating knob in front of the handle gain that allows you to adjust the resistance in the range of 10-50 kg (22-110 lbs). Resistance changes by turning the knob clockwise for a higher resistance level. Non-slip Handles - Covered with eco-friendly TPE material, soft and prevents it from accidentally slipping out of your hand when you get sweaty. The ergonomic design makes it fit comfortably in your hand and fits any hand size. Perfect for men and women, seniors and teenagers. Lightweight and portable - The handle weighs 150g, is 15.5cm long and is easy to clean and store. The lightweight design of the handle makes it ideal to store in your bag when you are on the go. You can exercise anytime, anywhere. Perfect Gift - Whether it is a birthday gift, anniversary, Valentine's Day, Christmas or Thanksgiving, this hand trainer is the perfect gift for friends and family. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.