Square-Headed Chalk Can Be Used by Construction Workers for Marking Purposes

Square-Headed Chalk Can Be Used by Construction Workers for Marking Purposes. Non-Toxic & Safe: Harmless, no radiation, safe for skin contact and children's use. High Hardness & Wear Resistance: Cut from natural ore with Mohs hardness 1, clear lines and long life. Customizable Sizes: Available in various sizes to meet specific marking needs. Dust-Free & Clean: No dirty hands or dust, ideal for clean marking environments. ISO9001 Certified: Manufactured under strict ISO9001 quality management standards. Asbestos Free: Safe material composition without asbestos content. Clear Mark Visibility: Marks remain visible on iron castings after processing or cooling. OEM Service Available: Supports full customization, samples, and design-based orders.