Durable construction: Made with high-quality ink and a polypropylene (PP) body for reliable, long-lasting use. The pen delivers consistent, robust color for clear, sharp marks that resist smudging during play. Precise alignment and marking: Includes an alignment tool to help you draw straight lines and custom patterns on standard golf balls, so you can quickly align your putts and personalize your balls for easy identification. Easy identification: Create unique markings or color accents to distinguish your balls from others during practice rounds, competitions, or crowded tee boxes. Portable and lightweight: Compact design fits easily in a golf bag or backpack without taking up space. Use it on the range, on the course, or at home. Versatile gift option: Practical for golfers of all levels—ideal as a thoughtful gift for friends, family, or teammates who practice, compete, or play casually. Low-maintenance performance: Smooth-flowing ink and durable PP casing mean fewer interruptions and reliable performance over many rounds. Use scenarios: Practice session: Mark alignment lines on multiple balls to train consistent putting aim and track changes in ball roll. Competition or casual round: Quickly identify your ball among others and use the alignment guide to set up confident putts under pressure. Group lessons or club fittings: Teacher or fitter can mark balls to demonstrate shot patterns or to track performance across different clubs. Materials and compatibility: Ink: High-quality, long-lasting ink suitable for marking polyurethane or Surlyn-covered golf balls. Body: Durable PP construction for a sturdy, lightweight tool. Compatible with standard golf balls and usable wherever quick, clear ball identification or alignment is needed.