Flat- and oval-head screws sit flush within these insulating washers, so they won't stick out and snag on objects. Washers cover the screw head and a portion of the threads to block electrical current and prevent short circuits. They also extend the life of your assembly by preventing galvanic corrosion, which is when two different metals rust more quickly due to contact with each other.

Dissolve microscopic surface flaws from metal parts for a mirror-like finish. These electropolishers send current through a conductive solution (sold separately) to remove a layer of surface material. They’re ideal for polishing intricate parts with hard-to-access features. Because they remove material evenly, they’re also good for applications where you need to polish your part without altering its dimensions. They’re small enough to fit on your workbench. Only use them on stainless steel and chrome workpieces.