Series C10
Lot of 3 Weldon C10 Collets C-10 Size 5/8", 3/4", 1" - 96-194, 96-195, 96-197
What stands out about WAGO is the tool-less wire insertion design.
NOS Genuine Weldon Brand Collet C-10 C10 Size: 5/8" Germany Balas Flexi Grip
You will find that the spinner turns freely without any rough spots or resistance.