Digital Display Torsion Wrench Adapter 13.5-135Nm Gauge Meter 1/2in 3/8in 1/4in Drive Item Type: Digital Display Torsion Wrench Adapter Model: SNC-135 Minimum Graduation Value: 0.1N.m Maximum Operating Range: 13.5-135Nm Connector: 1/2in Torsion Accuracy: CW ±2%, CCW ±2.5% Adapter: 3/8in and 1/4in Shell Material: ABS flame retardant material Sensor Material: 40 chrome steel Adapter Material: Chrome vanadium steel Power Supply: 2xAA batteries (not included) How e: (see the manual for details) 1. Take out the product and install the battery 2. Turn on zero, adjust the unit you want 3. Connect the torsion wrench to the socket and can be used Size(LxW): Approx. 7.5 x 4.5cm / 3 x 1.8in