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square drive socket | square bolt driver | pipe plug socket | female square socket | 4 point socket | square head bolts
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Amazon.com: Powerbuilt 3/8-Inch Drive Spark Plug Socket Set, 6 Point, Deep Thin Wall, 5 Piece Metric and SAE - 640855, Grey : Tools & Home Improvement
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Sunex® 3841 - 3/8" Drive SAE 4-Point and Square Pipe Plug Impact Socket Set (11 Pieces) - TOOLSiD.com
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Snap On 11 Pc. 3/8" Drive SAE Internal/ External Pipe Plug Socket Set (3/16-3/8") 211PPPMY - Shop - Tool Swapper
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CRAFTSMAN 4-Piece Standard (SAE) and Metric 3/8-in Drive 6-point 3/8-in Spark Plug Socket Set in the Sockets & Socket Sets department at Lowes.com
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