3M Performance Plus Wire Connector, Flexible Steel Spring Connectors, 22-8 AWG, Red and Yellow Color (R/Y+), Bag of 100 - Electrical Wires - Amazon.com
IDEAL Push-In Wire Connectors 3-Ports Orange (10-Pack) in the Wire Connectors department at Lowes.com
IDEAL Greenie Grounding Wire Connectors 92 Green (100 per Pack) 30-192P - The Home Depot
Green Winged Wire Connector for Grounding, 100 Carton - NSI Industries
Eagles 50Pcs Twist on Wire Connectors - Red #14 - #12 AWG Wire Cap Bulk with Spring Inserted, Easy Screw on Electrical Caps: Amazon.com: Tools & Home Improvement
Shopping:30-3171 Pigtail Term-a-Nut No. 10 Fork
Twist-on wire connector - Wikipedia
Methods for tying grounds together and ground pigtails | The Garage Journal
3M™ Performance Plus™ Wire Connectors | 3M United States
IDEAL Wing Wire Connectors Green (10-Pack) in the Wire Connectors department at Lowes.com
IDEAL In-Sure 3-Port Push-In Connectors, Orange (250-Jar) 30-1033J - The Home Depot
IDEAL In-Sure 3-Port Push-In Connectors, Orange (250-Jar) 30-1033J - The Home Depot