1.Premium Material Ratcheting crows foot wrench set is made of high hardness chromium molybdenum steel, heat treated for strength and durability. Special antirust and anticorrosion coating for long term use. 2.Crows Feet Size Coverage 15PCS metric crow foot wrenches set: 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm for 3/8' drive; 21mm, 22mm, 24mm for 1/2' drive. Fit for Your Needs. 3.Wide Application 15pcs crowfoot flare nut wrenches easily removes flare nuts on large cars, trucks, bulldozers and tractors. Ideal tool for vehicle maintenance. 4.Effective Work Crowfoot wrench set compatible with 3/8' and 1/2' drive ratchets, extensions or torque wrenches. Allows you to use in tight spaces. 5.Storage box The wrench set comes with a tool box for easy organization and portability. Each crowsfoot wrench is sizemarked for easy identification. Package: 15 pcs crowfeet wrench set, a portable case.