The Reaction Arm Back-Up Plate is a tool used to assist in the maintenance and assembly of front suspension struts while dealing with the nuts located at the top of the strut assembly. Used with a 4-bolt pattern, this plate provides a stable and secure platform that supports the reaction arm during the initial tightening or loosening of these nuts. This plate is used in conjunction with other tools to ensure that the strut assembly remains properly positioned and that the nuts are torqued to the correct specifications.Attributes:• Ensures accurate and efficient tightening and loosening of nuts.• Features a 4-bolt pattern for secure attachment and alignment.Applications: The Reaction Arm Back-Up Plate is used to support the reaction arm during the tightening or loosening of nuts on the top of front suspension struts, for secure attachment and stability.