Precise Marking with Positioning Needle: The design ensures accurate and consistent marking of straight lines, curves, and arcs, delivering professional results for various projects with high efficiency and strong control. Adjustable for Comfort and Accuracy: Features a scale for double-line spacing from 1.2 to 5.9 inches and height adjustment up to 31.5 inches, allowing users to work comfortably while standing to prevent back strain. Durable Stainless Steel Construction: Built with stainless steel, includes an industrial-grade bearing hinge and adjustable rotary damping for long-lasting line and circle integrity, plus high-quality rubber pressure wheels for excellent grip and wear resistance. Versatile Drawing with Compass Kit: Equipped with a compass kit, it easily draws essential lines for basketball courts, such as circles, semicircles, free throw lines, center circles, and three-pointers, ideal for creating courts on flat surfaces like home yards. Broad Application on Various Surfaces: Suitable for multiple settings including badminton courts, parking lots, warehouses, and gyms, marks straight and curved lines effectively on tile, asphalt, concrete, or epoxy floors.