18-Piece Impact Socket Extension Set. Impact socket adapters for flexibility with sizes: 1/4"F 3/8"M, 3/8"F 1/4"M, 3/8"F 1/2"M, 1/2"F 3/8"M. Complete set includes a variety of extension bars and adapters: 1/4"Dr and 3/8"Dr extensions in various lengths (3", 6", 10") and 1/2"Dr extensions.
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