Zonon 6 Pcs Square U Bolt Zinc Plated Industrial And, 3/8'' X 3-5/8'' X 4'' Suitable Size: the square U bolts are approx. 3/8 inch in diameter, 3-5/8 inch wide and 4 inch long, proper size can fit different fastening needs; Please check the size before ordering Sufficient to Use: you will get 6 pieces of zinc plated square U bolts with 6 pieces of frame plates and 12 pieces of nuts, sufficient quantity to meet your various needs and replacements Versatile Uses: the square U bolts can be applied for most fields, including industry, manufacturing, maintenance, automotive sector, clothing production, etc., also nice for fastening tubes, wood, trailer and more Quality and Sturdy Material: the square U bolt is made of carbon steel material with zinc plated, which is sturdy and strong, reliable and long lasting, rust and corrosion resistance; And it can withstand the weight, also suitable for rainy and wet environments Notes: it is better to use lubricant (not included) during installing the square U bolts to prevent wear and tear; Use a manual wrench or socket ratchet (not included) when installing nuts; Do not use high speed power tools or impact tools (not included) to tighten the nuts