Feature: 1. ERGONOMIC DESIGN: 12cm over the palm keel to support the wrist, S shaped arc, the arm and palm are comfortable. The 3.8cm wristband widens and fixes the wrist, does not slide and protects the joints 2. STABLE AND RELIABLE: Ergonomic design, the keel is long enough to better fit the wrist and support more stable 3. COMFORTABLE PALM BALL: Soft silicone palm ball design, corrects the clenched fist and the pen. Comfortably and effectively separate the palm space. Position the ring finger and the little finger to correct the child's tight palm 4. FITTING EFFECTIVELY: The wrist strap is widened and fixed, the keel does not slide, does not move, closely fits the wrist, the writing keel swings less, and the correction is more effective 5. INCREASED PROTECTION: Large area of protection, not only to protect the wrist, but also to protect the joints, increase the area of the wrist, to protect the wrist more effectively 6. FLEXIBLE AND BREATHABLE: Strong breathability, not binding, not stuffy, can be worn in all seasons. The fingers are free to move, do not hinder writing, and meet children's various hand shapes Specification: Item Type: Pen Hold Corrector Material: ABS, nylon Suitable For Wrist Circumference: Approx. 10 ~ 18cm / 3.9 ~ 7.1in . Package List: 1 x Pen Hold Corrector