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I think you're referring to an 'anti-static wrist band'.

When performing maintenance on a computer, it's essential to use an anti-static wrist band - to direct any static build-up to the earth. Computer components can fail if static from our bodies is allowed to build up to a high enough charge.

The 'anti-static wrist band' - simply fastens around one wrist of the user/technician, and is connected to the mains electricity's earth circuit by a wire & plug. Excess static travels down the wire, and into the earth.

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10y ago

What else can I help you with?