Keep your golf course clearly marked and professionally organized with these 18" Yellow Recycled Plastic Penalty Markers with Spikes. Designed for daily course use, these red markers offer excellent visibility while supporting sustainability with their durable recycled plastic construction. Each marker includes an integrated spike, allowing for easy placement and secure grounding in all turf conditions. Whether you're defining penalty areas, outlining hazards, or enhancing course navigation, these markers deliver long lasting performance and a clean, uniform look across the course.