Our lever arch files are available with two nickel electroplated plated ring clips, smoothed edges, round corners, and laser engraved with BST logo. The stainless steel lever arch files are manufactured from 304 grade stainless steel which is highly resistant to oxidation, rust, stain and corrosion with the added benefits of being strong, highly durable and easy to clean. The anodized aluminium lever arch files are extremely durable. The anodizing process helps to harden and coat the aluminium and this process helps to create a weather-resistant, tarnish-resistant surface that can remain like new for years, but over time, anodized aluminium will begin to naturally scratch and fade, just like any metal.