Quality Material: The gym weight stack pin is made of high-quality steel, ensuring sturdiness and durability. It is resistant to breakage, providing a long service life. Optimal Performance: With a length of 315mm, the extended pin helps maintain weight alignment as it moves along the bar, enhancing workout efficiency. User-Friendly Design: This weight stack locking pin is lightweight and easy to insert or remove, offering convenience for regular fitness use. Versatile Use: This weight stack extender pin is compatible with designated machines for various exercises. It supports training for wrists, fingers, forearms, elbows, shoulders, biceps, and triceps. Fits barbell plates with an inner diameter of 26-30mm. Great Fitness Accessory: A practical accessory for exercise machines, ideal as a gift for fitness enthusiasts. Each package includes 1 weight stack pin, 1 spring clip, and 1 R-shaped pin. Size Chart: Length: 31.5cm (12.40 inches). Suitable for barbell plates with an inner hole diameter of 26mm-30mm. Package Includes: 1 weight stack pin, 1 spring clip, 1 cotter pin. Note: Slight variations may occur due to manual measurement and screen display differences.