The paper presents analysis and comparison of theoretical models, evaluating the shape of steel fiber for anchoring properties in concrete. The analysis shows that all models evaluate this effect differently. Either way all discussed modes leads to different calculation results of strength of steel fiber reinforced concrete. According to this analysis, the test results of steel fiber pull-out tests is made and discussed in paper. The theoretical-empirical coefficient of evaluation of fiber shape, based on analysis of mentioned models and the test results, is suggested. This coefficient is verified with tests results of steel fiber reinforced concrete elements, subjected to bending and compression
