Made of beryllium copper, these wrenches satisfy OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present. Set the desired torque and the wrench indicates when it's reached with an audible click. To relieve pressure on the spring and maintain calibration, set torque to the lowest reading on the scale when not in use.

Note: Accuracy ratings apply to the entire torque range.

Warning: Do not use these tools in direct contact with acetylene.