【Adjustable Strength】 With a strength range of 5-60kg, tighten clockwise and weaken counterclockwise, a key to adjust easily from beginner to advanced use, meeting the needs of consumers, convenient for the whole family. 【High-Quality Spring, Strong and Durable】 The grip strength device adopts a high-strength spring with a diameter of 3.0mm and 10 coils, making it more robust and durable, with a long service life. 【Ergonomic Handle, Comfortable Grip】 The ergonomically designed handle fits the palm and provides a comfortable grip. The handle is made of TPE material, which further enhances grip, is non-slip and sweat-resistant, and prevents calluses even after long-term use. ＊Instant purchase welcome・Midnight silent purchase OK◎ ＊One-of-a-kind, first-come, first-served ＊Welcome to bulk purchases, feel free to comment ＊Free shipping! ・Please understand and purchase with home storage and simple packaging. (⁎ᵕᴗᵕ⁎) ・Please check the actual photos for the condition of the product♪ ※In order to sell at a slightly lower price, we may ship the product without the box due to shipping costs. PROIRON Finger Power Hand Grip Grip Strength Training Grip Strength Grip Forearm Muscle Training Hand Gripper Grip Strength Training Tool Finger Trainer Wrist Training Finger Grip Finger Muscle Training 5kg-60kg Adjustable Resistance #Kanana's product list is here ✨️☜ ☆58-26☆