Fibre Metal Quick Lock Kit WORKWEAR and drive size is a

and drive size is a measure of capacity

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42050-TM - 5/16" to 63/64" Diameter Mini

Fibre Metal Quick Lock Kit WORKWEAR and drive size is aQuick Lock. For long term combination use. Quick Lock mounting blocks are screwed onto the protective cap. Welding helmets, face shields,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.