Nylon PowerLoc shafts feature factory-fitted, machined rings which, unlike traditional springs do not open when flights are fitted. This results in an incredible vice-like grip. Flights are secured into the ends of the shafts with a tight Power Loc fit. Each package comes with 3 shafts. Shafts available in 3 lengths - Medium, Short, xShort. 550590 xShort Black 550591 xShort White 550592 Short Black 550593 Short White 550596 Midi Black 550597 Midi White 550594 Medium Black 550595 Medium White