These massive bowies are both examples of two different knives made with similar materials in the same blade construction.
The blades are Laminated steel, forged to shape, Damascus fittings and black micarta handles with stainless spacers. The knives are actually held together by the Damascus "nut" at the butt of the handles. There is no epoxy holding the knives together, just that heavy nut.
A knife that can be taken down without special tools is a benefit that will be seen down the road if ever maintenance or re-finishing is needed.