This retractable shaft adjusts in lengths between 38 and 52” perfect for belly and long putters. Shaft comes with a coupling devise that can be loosened and tighten with the wrench provided. Once epoxied to a putter head, simply loosen the coupling by twisting, slide the shaft up and down until the length is comfortable to the player, tighten the shaft and then you are ready to play. For professional club fitters, the Apollo Adjustable Belly & Long Putter shaft can make for an excellent fitting tool. For golfers that play a long putter and like to travel, the shaft can be collapsed and store safely in the bag.