The Golf Muscle Master weighted golf swing training aid has a hollow outer shaft fitted with a shorter solid inner shaft to keep 1/2 of the total weight, 38ozs, in the bottom 1/3 of the club. Instead of a solid shaft with the center of gravity in the center of the club like some swing trainers, the Golf Muscle Master's balance, weight and middle range club length of 38" will help you feel the club head. Our new C-Thru collegiate grips along with personalized coloring and lettering makes the Golf Muscle Master a great corporate or personal gift.