GearWrench Hex Bit Socket Set 82554 3 8 Inch Drive 6 Piece Long Metric (4 to 10mm S2 Steel Insert Bits Knurled Base Deep Reach Fastener Access) Wire Strippers Lightweight Aluminum Construction: Durable aluminum Lightweight Aluminum Construction: Durable aluminum frame wipe the grease fittings on the spider assembly clean before lubricating spray penetrating oil into the hex recess and press the S2 steel bit fully to the bottom of the socket to prevent rounding the internal flats The GEARWRENCH 82554 6 Piece 3 8 Inch Drive Long Metric Hex Bit Socket Set is an extended reach driver tool collection engineered for accessing deeply recessed internal hex fasteners in automotive engine bays