- 3/16" x 3/16" Square x 12" Long Steel Bars, Cold-Drawn Steel Bars (Pack of 5) - Undersized Key Stock (12”) - Perfect for Use in Small Manufacturing Runs, Custom Builds, and Aftermarket Repairs - Gear / Shaft / Pulley Connector keyway stock, 3/16 key stock, square key, Steel Bar; Steel Stock; Square Stock; Key Stock; 3/16 Steel; 3/16" Steel Key Stock; Oversized Key Stock; Keystock; Steel Rod, key bar, steel bar stock