Interchangeable shaft technology. It’s the buzz right now in the golf world. Integra’s new system of accomplishing this is as innovative and exciting as any in the industry. Not only that, it’s hundreds and hundreds of dollars cheaper than Callaway or others! The head and adapter combine to weigh exactly what a common driver head would normally weigh. First of all, it starts with a newly designed beautiful Integra Sooolong head. Super premium quality at a non-premium price! Golfers can test an unlimited number of shaft combinations and then play with the best combination for them. Simply screw any golf shaft into the threaded driver head (it’s a reverse thread), and tighten the connection with the supplied wrench. There’s also a small allen screw on the back of the hosel to snug up just for extra security. (even the small allen wrench is included with your kit) This kit comes complete with the Sooolong MOI-FIT head, THREE shaft adapters, three ferrules, hosel wrench, allen wrench, and beautiful magnetic headcover! The Sooolong MOI-FIT head is a full 460cc and incorporates the very latest technology in a high moment-of-inertia, game improvement design.