Abstract: A golf training aid is disclosed that trains a user for proper lead arm supination while a golfer swings a golf club. The golf training aid includes an extension that is applied to a golf club shaft and a stationary object. The user swings the golf club past a ball striking position and supinates the lead arm to rotate the extension around the stationary object. This golf training aid does not rely on a mechanism attached between the golf club and the user's arm to forcibly supinate the golfer's wrists. The extension can easily be secured, adjusted and removed from most golf clubs for practicing. The stationary object can be a removable pole, golf bag, or a plane stick training aid.