PBR Products toe plates. Used by Nascar champions here in Missouri and oval track racers all over. Easy and quick.just lay them against the bottom of the tires and put tape measures in the slots and read the toe. Easy to store and take to the track to keep your toe set after you have bumped the wall or other contact. Thank you and good luck at the track. NOTE DUE TO OUR TAPE MEASURE SUPPLIER THE BRAND AND COLOR OF THE TAPE MEASURES MY VARY. THEY ARE OF COURSE MATCHED SET BUT MAY NOT BE THE SAME COLOR OR BRAND IN PHOTOS.