Features and Benefits: Magnetized to hold fasteners securely during installation and removal Chrome-Molybdenum alloy steel for long life Fully guaranteed Radius corner design causes the socket to grab the sturdy wall or flat of the fastener instead of grabbing the corners resulting in less corner wear on the fastener Comes in a heavy duty blow molded caseSet includes: 3/16″ 7/32″ 1/4″ 9/32″ 5/16″ 11/32″ 3/8″ 7/16″ 1/2″ 5mm 5.5mm 6mm 7mm 8mm 9mm 10mm 11mm 12mm 13mm 14mm and 15mm 1/4″ Dr. Universal Joint and a 1/4″ Dr. 2″ Extension.