The Replacement Blades for the Jackson Safety Hard Hat Exchange System are made from lightweight HDPE. The system is dielectric so your hard hat retains an ANSI Z98.1 Class E rating. The replacement blades attach to the Jackson Safety SC-6 Hard Hat (forward or backward). It features a one-button action for quick release even while wearing gloves and the vertical lock-in eliminates helmet/face shield creep. The Hard Hat Exchange System lets you easily add, remove or switch between your welding helmet or face shield all without removing your hard hat. Now it's easy to stay protected at all times with the Jackson Safety Hard Hat Interchange System from SureWerx. Established in 1933, Jackson Safety has built a century long reputation for delivering the most innovative safety solutions in the welding and personal protective equipment industries. When it comes to providing safety solutions with long-lasting value, durability and comfort, Jackson Safety has set the standard. Whether the need is for welding protection in a steel fabrication environment, head protection on a construction site or hearing protection at an airport, Jackson Safety provides the widest range of safety choices to meet the needs of every job and every worker.