Vortex Pro Torque Wrench - Works with any 1/4in bit 10-90 in-lbs torque range. This is a precision instrument and should be handled and stored with care. Don't throw it or use a hammer with it. Do not hit anything with this torque wrench or use it as a hammer Improperly calibrated torque wrench may cause damage to parts or tools Do not use extensions on the handle as it will damage this torque wrench To ensure accurate torque readings, please keep the torque wrench squared to the screw head Handle is not insulated, do not use this torque wrench on live electrical or high voltage circuits