T&E Tools 3/8" Drive 31Pc. Metric Socket Set/Deep Metric Socket Set Metric Standard Socket Sizes: 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm Metric Deep Socket Sizes: 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 17mm, 18mm, 19mm Extensions: 3"(75mm) & 6"(150mm, Adjustable Handle, Spark Plug Socket: 5/8" Universal Joint, Quick Release Ratchet, and supplied in metal box