Develop grip strength, forearm definition and improve athletic and cross training performance with Body-Solid Tools Grip Trainers. High-quality billet aluminum anodized handles feature sure-grip knurling to ensure a comfortable hold that won’t slip. Three levels (100, 150 and 200 lb.) allow you to increase resistance as you develop grip strength. Body-Solid Tools Grip Trainers are constructed with alloy steel coil springs for peak performance and durability. Add Body-Solid Tools Grip Trainers to your gym bag, your desk or your car and build grip strength on the go. Ideal for stress relief, rehab and much more Develop grip strength, forearm definition and performance Billet aluminum anodized handles Sure-grip knurling Alloy steel coil springs Dimensions: 1″ thick x 4.1″ W x 5.1″ H Product Weight: .5 lb. Key Features Develop grip strength, forearm definition and performance Billet aluminum anodized handles Sure grip knurling Alloy steel coil springs Dimensions: 1″ thick x 4.1″ W x 5.1″ H Product Weight: 1/2 lb