This putting aid is an australian design. It is designed for both right and left-handed players. It will help to develop hand/eye coordination and concentration and most importantly will help you improve your target alignment and stroke. The Golf Putting Practise Aid will help all players from social and club players to professionals. The Golf Putting Practise Aid comes with a full set of instructions on the packaging showing you how to use the aid to improve your putting stroke. Note: The Golf Putting Practise Aid fits all regular shaft putters and regular long shaft putters.