The Master Lock No. 487D Rotating Electrical Plug Lockout Device - packed in carded packaging for showroom display - accepts cords with up to 3/4in (19mm) diameter and an electrical plug up to 2-1/4in (57mm) diameter by 3-1/4in (82mm). Device surrounds the electrical plug and protects against accidental reconnection. The unique, patented rotating design allows for easier installation in confined space applications. The tough, lightweight Zenex™ thermoplastic body withstands chemicals and performs effectively in extreme conditions. Includes high-visibility permanent safety labels. For 120-volt plugs and many 240-volt plugs. This carded product is suitable for display in commercial showrooms.