Quick-Lock. For long-term combination use. Quick-Lock mounting blocks are screwed onto the protective cap. Welding helmets, faceshields,etc. With Quick-Lock cups
can then be securely mounted onto, and removed from, the cap without tools. It is made up of two pieces. The mounting base (4002) uses two screws through the hard cap to act as a sturdy base. The second piece (4001) snap fits over the base and includes the pivot point for that attachement.