Allied Precision 28CSK, ClickShield Weather Resistant Cord Lock, 1-Pack, Black Secures any 2 cords together, prevents disconnects Has a unique ratchet mechanism: when you hear the "click", you know it's securely locked Includes an internal gasket assures a water-resistant electrical connection Great for any power tools, christmas lights, outdoor fountains and more Includes an internal gasket assures a water-resistant electrical connection