AccusizeTools - 9 Pairs Wavy Parallel Set, 1/2'' to 1-1/2'' x 1/8'' Increment, EG10-1440 1/2: to 1 1/2&#034; x 1/8&#034; increments +/- .0002&#034; parallelism All parallels Made from high quality spring steel Each parallel Hardened and precision ground Exceeds possibilities of conventional parallels For use on precision clamping for drilling, milling, boring, grinding, and assembly operations, etc. Supplied in fitted wooden case