CS Unitec Non-Sparking / Non-Magnetic Extension for Box Wrenches are a part of CS Unitecs Non-Sparking/Non-Magnetic and corrosion resistant Safety Tool Line. CS Unitec Non-Magnetic Extension for Box Wrenches are specifically designed to eliminate the risk of sparks at high-risk sites where explosive atmospheres may be present.CS Unitec Non-Sparking Extension for Box Wrenches are available in Aluminum Bronze and Copper Beryllium. CS Unitec Non-Magnetic Extension for Box Wrenches are designed to loossen and tighten nuts and bolts in tight or narrow places. CS Unitecs Non-Sparking Extension for Box 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.