CS Unitec Extension Bar, Aluminum Bronze CS Unitec Non-Sparking / Non-Magnetic Extension Bars are a part of CS Unitecs Non-Sparking/Non-Magnetic and corrosion resistant Safety Tool Line. CS Unitec Non-Magnetic Extension Bars are specifically designed to eliminate the risk of sparks at high-risk sites where explosive atmospheres may be present. CS Unitec Non-Sparking Extension Bars are available in Aluminum Bronze. CS Unitec Non-Magnetic Extension Bars are designed to provide extra length for sockets to loosen or tighten nuts and bolts in hard to reach areas. CS Unitecs Non-Sparking Extension Bars are drop forged for the highest quality in hand tools.