CS Unitec Non-Sparking Striking, Open End Wrenches are a part of CS Unitecs Non-Sparking/Non-Magnetic and corrosion resistant Safety Tool Line. CS Unitec Non-Magnetic Striking, Open End Wrenches are specifically designed to eliminate the risk of sparks at high-risk sites where explosive atmospheres may be present. CS Unitec Non-Sparking Striking, Open End Wrenches are available in Aluminum Bronze or Copper Beryllium. CS Unitec Non-Magnetic Striking, Open End Wrenches are designed to be hit with a hammer to loosen and tighten bolts. CS Unitecs Non-Sparking Striking, Open End Wrenches are drop forged for the highest quality in hand tools.Prop. 65 Warning for California ResidentsWARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.