StarTech.com SWS100 - ESD Anti Static Wrist Strap Band.

This durable ESD anti-static wrist strap helps you protect your valuable computer equipment from dangerous static electricity. The wrist strap/grounding bracelet offers hassle-free electrostatic grounding, allowing you to work freely on your computer without having to worry about static build-up, which could potentially damage computer components.

Designed and constructed to exceed IBM and US military static control standards, the grounding bracelet/ESD wrist strap is made from the highest quality static dissipative material to ensure the safe operation of your equipment.