One-handed operation for quick, easy-open on stream. Saves time fiddling with your fly box so you fish more. Spring-loaded, the lid eases open with a push of a button so you get at that urgent selection faster. Lid locks back in place with a click, so you know it's shut. Durable ABS plastic and the stainless steel hinge. Fly box is ultra-lightweight. Buoyant. Dimensions: 4 5/8"L x 3 3/8"W x 1 1/4"D.