Unit Selection: lbf.in, kgf.cm, NmDrive Size: 1/4" Hex (Anti-Lock Bit Holder)Torque Range: 0.44 - 4.4 lbf.in (0.05 - 0.5 Nm)Accuracy: ± 2.5% Power Source: 1x AAA Battery (Included)Overall Length: 7.99" (203mm)