This paper presents the results of the research on the experience of the probation officers use of the Risk Assessment Tool for perpetrators of criminal offenses. The aim of the research is to gain insight into the experience of probation officers in the implementation of Risk assessment Tool within their work with criminal offenders, and to identify the challenges faced by probation officers when using the Risk Assessment Tool in their work with offenders, and to gain insight into the suggestions of probation officers on how to improve the Risk Assessment Tool. The method of data collection is a semi-structured interview, and the method for data processing is qualitative data analysis. The research results show that the Risk Assessment Tool for Perpetrators of Criminal Offenses serves as an aid in dealing with perpetrators of criminal offenses, and that probation officers use it as a guideline for work, and that they recognize its specific shortcomings. In terms of challenges they state that the Tool is insufficiently adapted to Croatian context, and that it is not applicable to certain categories of criminal offenses, and that it requires the additional engagement of probation officers. They recognize a certain non-functionality of the Tool and the limitations that the deadline places upon their work. The proposals that the probation officers gave on how to improve the Risk Assessment Tool includes its simplification, standardization or validation of the Tool at the level of Probation system, and the need to increase the competencies of probation officers by obtaining more education, practicing supervisions and organizing workshops. They also propose certain changes in the way of scoring and in use of Risk Assessment Tool, as well as specifying a part of the Tool for certain categories of criminal offenses.