General description Neilsen 7-piece Flare Nut Wrench Open-Ended Brake Pipe Spanner Set is designed for use with fuel, brake, and air conditioning lines. This versatile set includes a range of sizes to accommodate various applications. Technical specifications Sizes included: 8 x 9mm, 10 x 11mm, 12 x 13mm, 14 x 15mm, 16 x 17mm, 19 x 21mm, 22 x 24mm