CS Unitec Non-Sparking / Non-Magnetic Construction Wrenches with Pins, Aluminum Bronze CS Unitec Non-Sparking Construction Wrenches with Pins are a part of CS Unitecs Non-Sparking / Non-Magnetic and corrosion resistant Safety Tool Line. CS Unitec Non-Magnetic Construction Wrenches with Pins are specifically designed to eliminate the risk of sparks at high-risk sites where explosive atmospheres may be present. CS Unitec Non-Sparking Construction Wrenches with Pins are available in Aluminum Bronze. CS Unitec Non-Magnetic Construction Wrenches with Pins have ring ends and 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 Construction Wrenches with Pins are drop forged for the highest quality in hand tools.