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3+ HELL0O bveddy nitce .. i am not know what is dis tink is for .. i thikn u pt socket isnto it ..
i can see no :
change in diameter of the hex area for fitting socket into

i see 5 rows (or columns) of socket setting areas but i am not knowing vut it is for as far as vich vun is bigga or da smallervun ..
tanks ..