Premium material : Made of great chromium vanadium steel , with a mirror polished surface . Chromium plating for rust prevention , heat treatment to achieve maximum strength , and drop hammer forging to extend service life Comprehensive size range : Covering sizes from 10 mm to 19 mm , providing all necessary standard sizes for various projects . With this complete set of metric horn shaped wrenches , you don't have to worry about missing any size Multi functional application : Compatible with the most commonly used extension rods and ratchet handles with 3/8 inch drives . This horn shaped kit is versatile and can enhance work efficiency Bracket : It includes a wrench bracket to avoid the wrench from getting lost and avoid the need for additional purchase . It is very suitable to be placed in a toolbox or drawer for easy access. Easy to carry and store, compact and save storing space in storeroom Convenient daily assistant : This open horn shaped wrench kit can bypass obstacles that standard wrenches and sockets cannot reach , making it ideal for DIY enthusiasts and professional mechanics, Manufacturer: PATNFR