Heavy-Duty Durable Steel: The weight stack pins are made of sturdy solid steel. The maximum load capacity of the weight pins is 45 lbs/20 kg. The round steel is very durable and will spring back when the weight plates are removed, but will not bend permanently. Simply insert the cable machine to customize your workout according to your needs Product Dimensions: Gym pin diameter Ø: 8/10 mm, length: 80/110 mm. Gym pin extender length: 150 mm. Weight pins extender diameter: 2 inches, suitable for add 2-inch weight plates. The package includes 1 spring clip Installation Instructions: The 8mm weight pin is suitable for counterweight stacks with a hole diameter of 10mm. And 10mm weight stack pin is suitable for counterweight stacks with a hole diameter of 12mm Wide Applications: Weight stack pins are suitable for home gyms, rope pull machines, strength training equipment, etc. Weight extender pins are the perfect accessory for fitness, training, weightlifting, etc. They make an excellent gift for anyone who loves fitness Purchase Notice!: The 8x110 mm gym pins are suitable for Techogym equipment and work very well. However, the 8x80 mm pins may not be suitable for Techogym equipment. Please measure the diameter and depth of the pin hole on the cable equipment before purchasing Heavy-Duty Durable Steel: The weight stack pins are made of sturdy solid steel. The maximum load capacity of the weight pins is 45 lbs/20 kg. The round steel is very durable and will spring back when the weight plates are removed, but will not bend permanently. Simply insert the cable machine to customize your workout according to your needs.Installation Instructions: The 8mm weight pin is suitable for counterweight stacks with a hole diameter of 10mm. And 10mm weight stack pin is suitable for counterweight stacks with a hole diameter of 12mm