Come and see our amazing products. The hand strengthener is made of high-quality silicone material, odorless and latex-free. The anti-slip ring is also tear and crack resistant for long-term use. It is easy to "take with you", carry in your pocket or pull out from your desk for workday use. Great for daily exercise to improve muscle strength, prevent stiffness and relieve joint pain and soreness. Ideal for improving hand strength for rock climbing, tennis, bodybuilding, golf and other sports. Made of comfortable, eco-friendly silicone material that is safe and scratch resistant. Pls confirm with us about the packing info, stock color and exact production time before placing your order.