Flare Nut Wrench Set, Metric, 5-Piece Forged, hardened, and tempered high carbon steel construction with chrome finish Perfect for working in tight spots, fuel lines on diesel engines and other automotive applications Wrench size range: 6 x 8, 10 x 12, 13 x 14, 15 x 17, 19 x 21MM Hex double-end broach style wrenches