OMS Anodized Aluminum Quick-Release Buckle offers a durable product while also being extremely lightweight and corrosive resistant. The buckle is anodized (coated with a protective oxide layer) which increases resistance to corrosion and wear. This process also adds the black color to them which is simply aesthetic but also reduces glare for photographers when YOU are the subject. This buckle performs the exact same function as the stainless steel versions but weighs less which makes it great for travel or for smaller divers when overall gear weight may be an issue. Designed with 3-slot openings on the back for attaching to standard { 2 in | 5.1 cm } webbing.