9 Piece1/4" Hex Shank Drill Extension Set (1/4", 3/8" and 1/2") and1/4" 3/8" 1/2" 3/4 " Drive Impact Socket Adapter and Reducer Set. 【 Secure and Tight Fit】 : Spring-loaded detent balls and the through hole on the drive end securely locks the adapter to the drive tang.
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