These mounting blades snap securely into clots on cap style hard hats with mounting caps that attach to welding mask faceshields and goggles and do not require tools for installation. Quick-Lok Blades For Slotted Cap, Color Black, Compatible with Brand Honeywell, Compatible with Manufacturer Model Number 110PWE, 880GY, Compatible with Series Fibre Metal, Features Mounting blades for FM Welding Helmets, For Use With Welding Helmet Protective Cap, Includes Kit, Material Plastic