If you are starting to get into flipping the first thing you need to do is pick a great trainer to practice with. Then, master flipping the knife open and closed. When you are choosing your knife you want something that feels comfortable in your hand. This trainer is built with a slim sleek design and a smooth handle surface. The sturdy sandwich construction is assembled in layers that are pinned or screwed together though may sometimes use a ball-bearing system. They allow the pivot pins to be adjusted tighter without binding. When the knife is closed, the blade rests between the layers. Both handles have a unique darkened stone finish. . What is most exciting about this trainer has got to be the comb? Yes, the cool comb to shape your do. It is made from ABS with a steel handle and frame. Both pivot pins are riveted for added security and the end of the bite handle features a safety latch.