Ground Cord 10mm 2X4mm Banana Ring Esd

Available in various other sizes and shapes, see here

Grounding Cord, Length 3m, Built-in 1Meg Resistor, Connection 10mm Female Snap. 4,3 x 8mm Ring Terminal.
Designed for use at workstations. Provides a common grounding point for one or two wrist straps, as well as table mats and runners.