[Saving time is saving money!] WALL-NUTS are designed to make wire splicing faster and easier than ever before – and all with the reliability you expect from WAGO. [Tool-free for your convenience!] PUSH WIRE connection technology allows installers to simply push-in any combination of solid and stranded conductors (Wire range: 20 … 12 AWG Solid and 18 … 12 AWG Stranded). [Stress-free terminations!] Low insertion forces combined with high wire retention makes for reliable, secure connections that eliminate after-installation worry. [Safer too!] The transparent housing and built-in test port make visual confirmation and troubleshooting of 2773 WALL-NUTS quick and easy [Billions of connections in service!] As the originator of spring pressure technology, WAGO has been the market leader in reliable connections since 1951!