Wide application: for golf courses and other environments where precise line marking is needed. It serves as a line marking pen and a golf drawing marker. Clear marking: fine pen tip provides clear lines, helping golfers accurately judge the course situation. It functions as a golf balls line pen and a drawing marking tool. Convenient triangle hook: easily attachable to your golf bag, ensuring it is always accessible and hard to misplace. It is compatible with golf marker and novelty golf ball markers. Easy to use: the uncomplicated design makes line drawing simple, enhancing your efficiency on the golf course. It is also described as a golf ball marking tool and golfing ball marker. Use scenarios: During rounds, draw alignment lines on greens and fairways to help aim and assess the course layout. On practice greens or ranges, mark target lines and ball lines to guide putting practice or shot alignment. While moving between shots, attach to your golf bag with the triangle hook for quick access and convenient line marking on the go.