Feature:Made with top grade, durable aluminum handles and high quality springs for a long-lasting exercise tool you can rely on. Ergonomic Knurling Design, Solid Aluminum/Sponge Handle For a Non-Slip Grip and Super Comfortable To Hold. Rust-Proof Coated Spring in 5 Different Resistance Level From 100lbs to 300lbs, suitable for beginners or professionals. Build stronger hands fast – our grip handles were not built for dainty little hands. They were built to toughen you up and that is how finger exercises should be. Great Gift Idea – Beautifully packaged in an attractive box, the Hand Strengthener Set will make a great gift for those who enjoy training and working out. We strive for 100% satisfaction and a premium experience; The integrity of our equipment and service is paramount; We thank you for the opportunity to earn your trust and your business. Product description:-Color: black silver
Handle material: aluminum alloy
Spring material: high-carbon high-quality steel
Length: 5.3 inches
Width: 3.9 inches
Handle length: 3.7 inches
Net weight: 1.8Lb
100LB weight 202g, 150LB weight 205g, 200LB weight 207g , Weight error ±5g) Grip strength value range: 100-300 lbs 100 pounds =45KG  （ Suitable forseldom exercise people) 150 pounds =68KG（   Suitable for regular exercise) 200 pounds=90KG（  Suitable for vocational training) After-sales service 30 days worry-free return and exchange, if you have any questions, please contact us 24 hours by email, we will solve your problem as soon as possible.