Black Callus Ball for Hand, Non-Sweat Moon Grip Ball Callus Rock for Skin Conditioning Building Grip Training Fidget Tool Anti-Sweat Anti-Slip Rock Climbing Strength Trainer

• Build Tough Calluses, Fast: Designed to speed up natural callus formation through controlled friction. Great for climbing, lifting, and high-grip sports.
• Lock in Grip with Volcanic Texture: Porous moon rock surface boosts non-slip friction, strengthens fingers and palms, and improves overall grip control.
• Skin-Friendly & Comfortable: Smart pore design allows firm squeezing without irritation. Condition skin for daily use and longer training sessions.
• Train Anywhere, Anytime: Small, quiet, and portable. Use at your desk, in the gym, or on the go — also works as a calming fidget tool.
• For Climbers, Lifters & Athletes: Ideal for anyone needing stronger hands, better friction, and sweat-resistant grip training — without the chalk mess.

Specification: Color: black Material: pumice Product Size: 5x5cm/1.97x1.97in Package details: 1 x callus ball for hand Note: Due to manual measurement, the size and weight may have a certain error. Due to the difference between different monitors, there may be a slight color difference existed.