The GearWrench 7-piece Magnetic Oil Drain Plug Socket Set features oil drain plug sockets that have a magnetic core and include patented GearWrench Surface Drive technology. The set comes with a Pass-Thru ratchet featuring a GearRatchet handle and 13mm, 14mm, 15mm, 16mm, 17mm and 19mm sockets to fit most domestic and import vehicles. Each socket is encircled by a knurled speed ring for quick removal and installation. For easy identification, each speed ring is color-coded anodized aluminum.