Cutting elements and bits incorporating such cutting elements are provided. The six parts can be assembled by the user without the use of tools or small parts, this being a major distinguishing feature of the invention. Therefore, even if the sum of the reference images is increased, since they are subdivided and classified corresponding to the attributes, the number of the reference images for each attribute can be reduced, and further the image database of the optimal attribute can be selected automatically in conformity to the situation of recognition such as date, time and so on. 20 pounds force and an adhesion force to an underlying surface material of greater than about 0.