Jackson Safety Welding Helmet Interchange System (38426), Attaches Hard Hat, Quick Release, Vertical Lock 6 Jackson Safety Hard Hat Welding Helmet Interchange Systems / Case Gives an audible click, so you know your PPE is assembled correctly without visual inspection Use this system with the Jackson Safety SC-6 hard hat (sold separately) with the bill forward or backward Quick release with one simple button, even with safety gloves on The vertical lock eliminates helmet and face shield creep