Feature 1Fitment: The magnetic swivel spark plug socket is a replacement for 1 Series E81 E87 N43B, for 3 Series E90 N43B, for 5 Series E60 N43B. 2Unique Design: 360 degree swivel action for maximum flexibility in a tight area. And magnetic core effectively retains spark plugs and minimizes damage. 3Magnetic Swivel: The interior magnet retains and protects the spark plug, not easy to loose the plug when installing and removing, more convenient and efficient. 4Premium Material: Hardened and heat treated chrome vanadium alloy steel and chrome plated mirror finish maximizes longevity of abrasion and resists against rust and corrosion. 5Important Parameter: The size of this magnetic swivel base is 14mm, the size of the driver is 3/8in, with a 12 point design, which is much thinner and fit s perfectly for operation.Item Type:MagneticSwivelSparkPlugSocket .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Material: Chromevanadiumalloy steelMagnetic Swivel Base: Approx. 14mm/0.55inPoint Number: 12Driver Size: 3/8inFitment:Fits for1SeriesE81E87 N43BFits for3SeriesE90 N43BFits for5SeriesE60 N43BPackage List1 x SparkPlugSocket