ITEM NAME:16mm Spark Plug Socket Thin Wall 12-Point with Magnetic Removal Tool Drive Description: Magnetic insert for secure connection Chrome vanadium steel for long lasting service Chrome plated for rust resistance Serration depth as deep as the fastener Entry Angle guides fastener Specification: Material: Stainless Steel Size Chart: Size: Approx. 105x16mm/4.13x0.63inch Package Includes: 1 Piece Spark Plug Socket Retainer Note: Please allow 0.5-1 inch difference due to manual measurement.(1 inch=2.54cm) Please check the size measurement and the picture carefully before making.1 Piece Spark Plug Socket Retainer. Magnetic insert for secure connection. Entry Angle guides fastener. Size: Approx.