Checkline R51 [MR51-12] Torque sensor, 12 lbFin / 1 lbFft / 140 kgFmm / 135 Ncm / 1.35 Nm Capacity. Checkline R51 sensors measure bi-directional torque for numerousapplications across virtually all industries. Interchangeable Jacobs chucksand bit holder add flexibility for a variety of applications. The sensors canbe used as hand held devices or mounted to a test stand. Superb overloadprotection adds peace of mind. Capacities available from 10 ozFin to100 lbFin [7 to 1150 Ncm]. Compatible with Mark-10 model 5i and 3iindicators (sold separately) through unique Plug & TestTM technology.