1. Our Dynamometer features a high-strength alloy spring and solid PP handle with TPR rubber coating, it is firm and for long-term use. 2. This adjustable Dynamometer includes an upgraded adjustment button,allowing you to easily set resistance from 5KG to 60KG,making your workouts more efficient and tailored to your strength level 3. With its portable and lightweight design,this Dynamometer can effortlessly fit into your pocket or backpack,enabling you to exercise at home,in the office,or while traveling 4. for climbers,martial artists,athletes,and anyone aiming to enhance hand strength,our Dynamometer serves as an essential tool for muscle training and grip improvement 5. on forearm muscle training with this adjustable Dynamometer,designed to help you build grip strength and endurance effectively,turning your downtime into productive workout sessions