Abstract: A stencil is provided with a slot straddled by a pair of tracks which accommodate a plurality of alphabetic/numeric plates having openings formed as characters. A mask is also insertable into the tracks to hold the plates in position and to conceal the abutting edges of the plates. The stencil is of a bendible material susceptible of being conformed to curves so that the stencil may be used in applications such as marking automobile parts with identification numbers.