The patented non-slip ratchet system is easy to use and offers precise size adjustments. The SmoothLok ratchet is available on the KHG4001 and KHG5001 headgear and on the following hard hats: The Matterhorn, Summit, Everest, K2 series and The Peak A69R, A79R. Accepts a wide range of faceshield styles Large spark guard provides excellent protection Cross strap adjusts to allow an exceptional fit Full floating mount spark guard provides comfortable wear even with heavy faceshield and continuous use 4000 Series comes with quick-change system for holding faceshield 5000 Series comes with protected holding system for faceshield to help reinforce splash protection to inside of the faceshield PHG Series comes with pinlock adjustment KHG Series comes with SmoothLok ratchet adjustment for quick: easy and perfect fit