Yellow Insulgrip plugs have rugged nylon housings and a detachable cord grip that utilizes a unique offset jaw arrangement for secure strain relief.
The grip range in the plain plug is 0.23 - 0.72".
Yellow plug with anchor locking screw is used to prevent accidental pull-out from socket; the plug is "locked" into the receptacle when the screw is turned down so the head is flush with the plug surface; the grip range on this plug is 0.30 - 0.69".