General description Neilsen Flare Nut Wrench Open-Ended Brake Pipe Spanner Set includes 6 pieces designed for easy access to gas, brake, and air conditioning lines. The wrenches are made from drop forged carbon steel, heat treated, and chrome plated for durability. Technical specifications Material: Drop forged carbon steel Finish: Heat treated and chrome plated Offset: 15 degrees Sizes included: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 1"