Measures disc brakes and up to 12" on brake drums. 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. 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. Stainless steel frame. Large easy-to-read display. Resolution: .0005"/.01mm. Direct inch/metric conversion. 4-way measurement, inside, outside, depth and step. Includes molded case.