CS Unitec Fixed Spanner Wrench, Aluminum Bronze CS Unitec Non-Sparking / Non-Magnetic Fixed Spanner Wrenches are a part of CS Unitecs Non-Sparking/Non-Magnetic and corrosion resistant Safety Tool Line. CS Unitec Non-Magnetic Fixed Spanner Wrenches are specifically designed to eliminate the risk of sparks at high-risk sites where explosive atmospheres may be present. CS Unitec Non-Sparking Fixed Spanner Wrenches are available in Aluminum Bronze. CS Unitec Non-Magnetic Fixed Spanner Wrenches are designed to grip or add mechanical control when turning nuts, bolts, and fasteners; or to hold them in place. CS Unitecs Non-Sparking Fixed Spanner Wrenches are drop forged for the highest quality in hand tools.