Klein Tools Multi-Bit Screwdriver Nut Driver, 11-in-1, Ph, Sl, Sq

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screwdriver blade , a worm , an oil bottle formed in the hollow cavity within the main body , and a square slot in the head of the second pattern ramrod

square slot combination screwdriver To unscrew a screw with a square shape hole , you 'll need a Robertson wrench This type of wrench has a square-shaped tip that fits snugly

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