Safety Tags are to identify temporary hazard until that hazard is eliminated or hazardous operation is complete. They comply in accordance with OSHA 29 CFR 1910.145 and ANSI Z535 requirements. Thin and flexible 10-mil poly-based cardstock is without wood content. Longer-lasting durable tear-resistant, waterproof, and will not crack, distort, or shrink, compare to traditional paper cardstock. Easy to write on matte surface. Has 3/8" plain top, pull-resistant hole.