1 Special Design:Post length is 14”(longer than normal post length), which fits 11 regular 45 lb plates,loading up to 495 lbs.The Belt squat attachment is 30" long, 14" high,the weight is 18 lbs or so 2 One Size Fits All:The pin is 5/8’’,which can fit rack hole diameters of 5/8" or larger.The belt squat attachment fits 2" x 2", 3" x 2", 3" x 3" different racks,perfect attachment for your gym 3 Easy Installation:You can easily finish installing the belt squat attachment less than 3 minutes(read instruction inside package),please notice that the belt is not included.