PACKAGE INCLUDES:You will receive 3pcs weight stack pin,perfect for use at home or commercial gym accessories are ideal.It allows you to perform high-quality workouts in a comfortable environment that has never been easier. VERSATILE: The diameter of 3/8 “ ; locking space of 6”.Our weight stack pin are made of chrome-plated steel and plastic material,more stable and durable while providing more options for workouts.The rust-resistant materials ensures years of reliable use. EXTENSION OF LOCKING SPACE: The 6” extension pins long enough can attach the ring to the weight plate center bar and fits most machines. EASY TO OPERATE: It is high-quality materials ensure durability while being simple to install and ready for immediate use.Our 6-inch weight stack can be used to quickly and easily adjust the weights, which can effectively increase strength and provide a comprehensive workout experience. BEST SERVICE: It is a great complementary accessory to your home gym or commercial gym equipment to increase the intensity of your workout and help you build muscle and burn fat. Cycling progressive weighted weight stack adjusts your body's performance and strength to help you achieve your fitness goals faster. 3pcs Weight Stack Pin