Morris Products 23184 Twisted Wing Connector, Type, Yellow, 18 - 10 Awg, max: 3 #12 min: 2 #18  Wire Combinations (Pack of 500) Winged Twist Connectors - Winged Twist Connectors make Connecting Electrical Wiring Simple and Easy. Swept wing fits into your hand naturally to give extra torque leverage and reduce the effort required for connecting even large wire combinations, yet compact, with narrow profile to take up less space in junction boxes Ribbed cap on color coded wire connectors provide more secure grip and faster fingertip starts even when hands become slippery Deep Skirt Entry Provides Protection From FlashOver or Shorting and Keeps Strands from Splaying Live Action Square Wire Spring Draws Wires Deep into Spring Provides a More Secure Grip