PRECISION MARKING: Ultra-fine point permanent marker pens perfect for detailed writing, drawing, and precise marking tasks PROFESSIONAL QUALITY: Fine permanent marker design ensures no skipping or leaking for smooth, clean results with consistent ink flow PREMIUM INK PERFORMANCE: Quick-drying, smear-proof, and fade-resistant ink for lasting visibility MULTI-SURFACE USE: Works effectively on various surfaces including photos, plastic, wood, stone, and metal SAFE APPLICATION: Conforms to ASTM-D4236 standards for safe use across various environments