Set of 8 brackets with hardware. The bolts that are included are 5/16-24 thread which thread into the brackets. The holes in the brackets are 5/16" diameter.Use one set per front bucket or bench seat. Used to relocate seat rearward or forward by 1 1/2" or 2". Can be installed on top of or below the carpet. Includes 8 bolts and washers to retain seat to relocation brackets. Hardware to fasten relocation brackets to the floor of the car not included. Some applications may require hardware in place of or in addition to hardware Included. Black powdercoated finish.