ISO BU455 Type 316 Stainless Steel Buckles 5/8" - 100 per Box. It Straps On, Inc., Type 316 buckles are the most rust and corrosion resistant stainless steel. Type 316 buckles are usually referred to as "marine grade" stainless steel. It Straps On, Inc., the band and buckle experts are providers of high-quality stainless steel banding, buckles, wing seals and sign brackets. ISO is an American manufacturer and our stainless steel is melted and manufactured in the USA to ASTM Standards. It Straps On, Inc. products are a perfect choice anytime your application requires strength, durability and corrosion resistance. Easily installs with the following tools: Cool Tool #TOO1, Ratchet Tensioner #T101, and Tensioning Tool #T1916