Gold EYE CHECK golf marker, convenient with case. - Model Name: EYE CHECK - Type: Golf Marker - Color: Gold - Accessories: Case This is the "EYE CHECK" golf distance measuring ball marker. It is manufactured by IDAMakers and made in Korea. It has a scope structure, allowing you to visualize distances from 3m to 10.5m simply by rotating the marker. It does not require batteries or step counting and helps you accurately grasp your putting distance. Thank you for looking.