CS Unitec 12 Point Offset Striking Box Wrench, Aluminum Bronze CS Unitec Non-Sparking / Non-Magnetic 12 Point Offset Striking Box Wrenches are a part of CS Unitecs Non-Sparking/Non-Magnetic and corrosion resistant Safety Tool Line. CS Unitec Non-Magnetic 12 Point Offset Striking 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 12 Point Offset Striking Box Wrenches are available in Aluminum Bronze. CS Unitec Non-Magnetic 12 Point Offset Striking Box Wrenches are designed to loosen and tighten bolts and feature a square handle that is struck with a hammer to help tighten large fittings. CS Unitecs Non-Sparking 12 Point Offset Striking Box Wrenches are drop forged for the highest quality in hand tools.