If you have ever had to move a car AFTER taking the wheels off, you know that these can be a lifesaver! Simply bolt the Roll Around attachments to your Auto Dollys (sold separately). In minutes, the car is mobile again! Universal 5-slot pattern fits 5 x 4 1/2 through 5 x 5 wheel stud patterns. Set of two, requires 2 Auto Dolly platforms (sold separately).