I recently purchased these decals for my workplace and have been impressed with their quality and effectiveness. The eye-catching crossbones pictogram immediately grabs attention and clearly conveys the message of safety. The inch 625 compliance ensures that they meet high standards for safety training in industrial and scientific settings. Through trial and error I found that placement in high-risk areas was key to their success .The only con is that they are a bit more expensive than some other safety decals on the market, but I believe the added effectiveness is worth the cost. Overall, a great investment in workplace SAFETY..