The Apeks GripLock Tank Band Assembly features a marine-grade stainless steel buckle with a finger-saver design that prevents pinching during use. The durable nylon strap includes preset positions for standard cylinder diameters, while the macro-adjustment system allows fine-tuning once the band is secured on your tank. An integrated rubber traction pad on the buckle back ensures reliable grip and stability. Set it once and forget it-perfect for divers who switch between different cylinder sizes.