Flare Nut Wrench Set Alloy Steel Chrome Range of Head Sizes 9 mm to 21 mm Overall Length 5 mm 5.57 mm 6.18 mm 6.81 mm 7.12 mm 7.62 mm 0 Degrees Head Thickness 11/1000 in 13/1000 in 2/125 in 17/1000 in 21/1000 in Insulated No Metric Double End 6-Point Flare Nut