Product size about : 15.9*11.5cm/6.2*4.5'' Product color: As shown in the figure Product material:High carbon steel + nylon product features: 1.This grip strengthener comes with an extra-large and thick automotive-grade spring, designed to be more provide consistent resistance during workouts. The spring is made from high-quality materials that ensure it lasts long even with frequent use. 2.It offers an adjustable resistance range from 5kg to 120kg, making it perfect for everyone from beginners to advanced users. You can easily change the intensity to match your fitness level and gradually build up your hand strength. 3.The built-in electronic counter with a clear LCD display helps you track your repetitions accurately, supporting counts up to 9999. This feature allows you to monitor your progress and stay motivated with quantifiable results. 4.With a smart design that maintains a full 50mm exercise stroke even at the lowest resistance setting, it ensures that users with weaker grip can still get an effective workout without shortening the movement range. 5.Featuring an ergonomic non-slip handle and a square adjustment knob that prevents slipping, it comfortably targets multiple hand and arm muscles, ideal for activities like weightlifting, climbing, or daily strength training. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Hand Grip Strengthener