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arkers in solid colors (Red/Blue/Black) or custom mixes (e.g., 4Red+4Blue, 3Red+3Black+2Blue, 1Red+1Black+1BlueοΌ1Red οΌ 1Black οΌ 1Blue), perfect for high-frequency use, team workflows, or color-coded projects. - π³οΈ Deep Hole Specialist β 20mm tungsten nib (0.78 inches) reaches 15mm deep holes β mark hidden joints, engine bay parts, or narrow gaps without disassembly, saving 50% time! - π§οΈ All-Weather Durability β IPX5 waterproof ink resists rain and oil. Quick-dry formula (<3 sec) stays crisp on polished metal or greasy surfaces. - π οΈ Military-Grade Build β ABS shockproof body + anti-slip grip , survives -20β~80β extremes. Nib lifespan: 100,000+ marks (3x longer than average). - π Universal Hard Surface Mastery β Works on wood, concrete, tile, glass, plastic, and automotive parts. Precision <0.5mm for carpentry, metalwork, or DIY crafts. π Specifications - π·οΈ Product Name : De...