Material and construction - Housing: Engineering Environmental Protection Plastic - Spring: high-strength alloy spring wrapped with a TPR handle - Core: high-strength spring steel Adjustable resistance - Model: Pre-60kg - Resistance range: 5 kg to 60 kg - Easy to adjust to fit your level; you can gradually increase resistance to gain more benefit Key benefits - Improves grip strength and forearm endurance - Supports rehabilitation for hand injuries, arthritis, and tendinitis - Useful and efficient for strengthening and conditioning - Helps reduce stress and build durability in the arm and hand - Suitable for anyone who wants to exercise and develop a strong arm Usage scenarios - Home workouts: ideal for use in the bedroom or living room - Office breaks: easy to use during short breaks to maintain arm strength - On the go: portable enough for travel or use in various settings How to use - Start with a low resistance within the 5 kg to 60 kg range - Gradually increase resistance as you progress to maximize benefits - Use with consistent, controlled movements to target grip and forearm muscles Notes - Designed for grip training and arm strength development - Compatible with a range of fitness levels due to adjustable resistance - Built for durability with a sturdy plastic housing, alloy spring, and steel core