The durability of this knife is amazing because both handles have a double walled construction. The inner wall consists of stainless steel with the outer wall containing decorative ABS mounts and steel. The blue mounts to just like a mid-day sky and each piece is riveted on. The training blade is actually a comb. How cool is that? The comb is made from an ABS material to style your locks when you are on the go showing out. A safety latch is provided to lock the blade open or closed. So if you are just starting out and want to perfect more advanced tricks like the pinwheel or the aerial it is best to start with a trainer like this one.