Power surges and lightning strikes are not the only things that can damage your home workshop equipment. Simply switching your workshop tools on and off can create electrical imbalances that could cause cumulative, permanent damage to your valuable equipment. The Belkin SurgeMaster® with metal case provides clean, safe power from 10 grounded outlets, for workshop and other electronic devices. The Belkin name assures you of top-quality construction, inside and out. With a rugged metal casing surrounding its advanced elements and superior circuitry, the Belkin SurgeMaster® with metal case offers the most complete protection available from power surges, AC contamination and spikes.Please note: The protective components inside surge protectors absorb over-voltage spikes to protect your connected devices which means they will eventually wear out. Replace them every 3 years or immediately after any over-voltage spike event such as a thunderstorm or power outage because surge protectors degrade faster if they are exposed to high intensity events. Periodically check the surge protector enclosure and cable for signs of wear or heat distress. Replace an expired surge protector with a new one at the end of its useful life.