Features: 1.Fittment:12030 Flare Nut Socket Set fits for 3/8″ square drive. Work on ABS, master cylinder, coolant, diesel injection sensors and high pressure fuel lines. 2.Material:Constructed from premium chrome vanadium steel with chrome-plated surface. Hardened construction for high strength and impact resistance, anti-corrosion, anti-rust, sturdy and durable. 3.Robust Construction:The flare nut socket made of chrome vanadium steel, allowing for strength, durability, and corrosion resistance. Heat-treated to ensure hardness and precision-machined in high torque force. .