Kobalt 20 Piece Standard (SAE) and Metric Combination Polished Chrome Mechanics Tool Set Acrylic Drop In Tub A: Yes—the checkered countersunk head is and steel yoke housing A: Yes—the checkered countersunk head is designed to set flush or slightly below the surface 3375 Deadbolt cross bore diameter (in 71 Spark Plug Socket(s) Included No 3 8 in Drive Ratchet Included No Finish Polished chrome Deep Socket(s) Included No Measure Type Standard (SAE) and Metric combination 1 4 in Drive Ratchet Included Yes Drive Type 6 point Shallow Socket(s) Included Yes 11 and 12mm Organized in a blow molded case for convenient storage and easy transportation Meets or exceeds ASME specifications Tools are covered by our hassle free lifetime guarantee