Porter's Five Forces is a model that identifies and analyzes five competitive forces that shape every industry and helps determine an industry's weaknesses and strengths. Five Forces analysis is frequently used to identify an industry's structure to determine corporate strategy. The following Rivalry Among Existing Competitors shows the major competitive forces -- the threat of substitute products or services, bargaining power of buyers, the threat of new entrants, and bargaining power of suppliers. EdrawMax Online is one of those free online tools that offer free templates and has a collection of over 26,000 symbols. You can even create your own symbols or customize Porter's Five Forces templates as per your needs.