-3 AN to -20 AN Spanner Tool Set Aluminum Double Hose End Fitting Wrench Kit, Set of 7

1set (7pcs) as the picture shown, the wrenches thickness is 10mm. They feature specially formed jaws that are able to contact a fitting on four opposite sides to avoid stripping and or marring an aluminum fitting's finish. Made from 6061-T6 aluminum and anodized in various colors for easy identification, the double-ended wrenches feature a B-nut or the S-nut end. The B-nut is the part of the hose end that fastens the hose, the S-nut is the part of the hose end that fastens the fitting to the male flare. Green Wrench: 3S-4B Silver Wrench: 4S-6B Black Wrench: 6S-8B Blue Wrench: 8S-10B Purple Wrench: 10S-12B Red Wrench: 12S-16B Orange Wrench: 16S-20B Specifically designed for AN aluminum hose ends and fittings, these double-sided wrenches allow for tightening of any AN fitting with just one set of wrenches. Recommendations: Designed for use with aluminum fittings. Using the wrench with other materials will likely cause damage.