Stackable Gains: Our weight stack pin is designed to allow an additional weight plate to be added to the side of your cable machine weight stack Weight Stack Extender Pin: The Micro Gainz weight pins for weight stack machine are designed to be used with 2″ Olympic plates that have a 2″ (50.8mm) hole in the middle Extra Weight: The weight loading pin body is made from Aluminum that is 3-1/8" in length; The Micro Gainz GymPin can accommodate up to one 45 lb Olympic weight plates depending on plate thickness High Durability: The gym pins for weight stack are made from solid steel that is case-hardened for extra durability; Always slot the weight selector pin, which comes with the machine, underneath the Micro Gainz GymPin ENSURE ACCURATE FIT FOR MACHINE - Ensure the right compatibility by measuring your cable stack pin diameter before purchase of the Micro Gainz GymPin. The Micro Gainz GymPin comes in 5/16" or 3/8" pin sizes. Get the right size pin for your gym equipment before purchasing The Micro Gainz GymPin is a versatile addition to your gym equipment. This GymPin comes with some outstanding features designed to enhance your workout experience. The Micro Gainz Gym Pin comes in two pin sizes, 5/16" and 3/8", allowing you to select the one that perfectly matches your gym equipment's existing weight pin or pinhole diameter. Ensure the right compatibility by measuring your cable stack pin diameter or the hole diameter on the weight stack plates on the machine before purchasing the Micro Gainz GymPin. The construction of the GymPin is high quality, with a pin body made from precision-machined aluminum, measuring 3 1/8" in length, while the pin portion is crafted from solid steel, case-hardened for extra durability. This combination ensures it can withstand the rigors of your workout routine. Despite its sturdy build, the GymPin remains relatively lightweight, tipping the scales at approximately 1lb 1oz. Its overall length measures about 7-1/4". Designed to accommodate 2" Olympic Weight Plates with a width of 50mm, it can hold up to a 45lb cast iron Olympic weight plate. The Micro Gainz GymPin is an essential piece of equipment for fitness enthusiasts. It opens up new possibilities for your home and multi-station gyms, enabling you to gradually increase weights and push your fitness boundaries. With its robust construction and thoughtful design, this GymPin is a must-have for anyone looking to elevate their workout routine. The Micro Gainz GymPin boasts the "Made in Pennsylvania, USA" label, assuring you of its quality and craftsmanship. Safety reminder: This is not a substitute for your current machine's weight selector pin. Do not exceed the manufacturer's suggested weight capacity when using this product with your gym machines.