Flare Nut Wrench Set Alloy Steel Satin Range of Head Sizes 38 in to 11/16 in 9 mm to 21 mm Overall Length 6 1/4 in 6 15/16 in 7 1/2 in 7 9/16 in 8 in 8 3/4 in 8 13/16 in 9 3/8 in 0 Degrees Head Thickness 21/64 in 11/32 in 3/8 in 25/64 in 13/32 in 7/16 in 29/64 in 15/32 in 31/64 in 1/2 in 33/64 in 17/32 in 37/64 in 19/32 in Insulated No SAE/Metric Double End 6-Point Flare Nut