1、DIVERSE SIZES: The carriage bolts has various sizes which can fully meet your needs. 2、APPLICATION: Applicable for insulating materials easy for welding penetration widely used in industrial machinery. 3、A2?70 STASINLESS STEEL: Made of high quality A2?70 stainless steel corrosion resistant and high strength. 4、WIDE RANGE OF USES: Suitable for professionals amateurs landlords repairers and other DIY. 5、EASY STORAGE: These are bolts which easy to store and identify which can ensure long term use.