In general, Professional golfers, like beginners, find it difficult to learn the proper posture for golfing. When actually putting, heavy psychological burden makes golfers, both pro and beginners, shake much after swinging. This experience causes many mistakes. Therefore, various putting practicing equipments were developed to fix the direct putting posture and help golfers learn the proper way.
The existing balls used to practice putting with current putting-practicing equipments are ordinary golf balls that when struck, makes difficult to grasp whether the balls rolled in just one...