Raceworks 37 Degree AN Die Kit - Suits RWT-023 Flaring ToolRaceworks 37 die and head kit to suit Raceworks RWT 023 single double flare tool kit. Use with AN tube nuts and sleeves. Includes dies for 3 16", 1 4", 5 16" and 3 8" hard lines. Raceworks offer a range of tools to assist with assembling your hoses and fittings and are made of high quality materials and are built to last. All Raceworks products come with a 2 year warranty.