Xtra Value Cal Drum and Rotor Measuring Kit with Caliper includes set of clamps; 4 sets of set screws; 1 allen wrench; 1 set of 3-3/4" contact points; 1 set of 3/4" cone contact points and 1 set of 3/4" flat contact points in plastic tube.Measures disc brakes and up to 12" on brake drums. When measuring brake drums only, add 8" to measurement allows for long cone and jaw widths. For use with 6" and 8" calipers.Caliper features:range: 6"/150mm, large easy-to-read display, resolution: .0005"/.01mm anddirect inch/metric conversion. Has 4-way measurement, inside, outside, depth and step.We ship APO, FPO and combine shipping.