1.STRONG MATERIAL This forearm strength trainer is made of durable carbon steel and a wearresistant double spring system and is designed for durability and provides a gentle rebound for optimal muscle building. Its sturdy frame is rust resistant for reliable, grippy training. 2.Adjustable Strength: This easily adjustable from 5 to 175 kg forearm strength trainer meets individual needs and is suitable for different groups, ensuring progress for different training purposes. 3.EFFICIENT PROGRESS TRACKING Easily improve your grip strength with our forearm strength trainer, complete with mechanical counting and an easy to reset quantity indicator for efficient progress tracking; Monitor your workout times at a glance and record your workout improvements. 4.Gentle on Hands: The soft comfort grip and nonslip TPR material of this forearm strength trainer are designed to conform to the palm arch and prevent hand injuries. Say goodbye to hand fatigue and look forward to improved grip strength and better muscle endurance.