S2 Alloy Steel Bits With Sandblasted finish . Chrome Vanadium Steel Sockets With Chrome Plate. Socket With Notched drive and lock onto drive tang . Set includes: 1/4" drive 4" long . 4mm, 5mm 6mm 3/8" drive 4: long 8mm. 9mm, 10mm,12mm , 14mm (tamper-proof) 1/2" drive 4" long 16mm ( tamper-proof) 18mm ( tamper-proof) Triple square XZN bits are made especially for German vehicles . Complete with plastic storage case .UTOPIA TOOLS