Quick Answer: The One Way Plug Key is a single-gap switch of polished brass blocks on an insulated base, closed by a tapered brass plug with an insulated handle. Two 4mm shrouded binding posts take the leads.
Last updated: October 2026
Key Features
Single way, closed by one tapered brass plug
Insulated handle on the plug
Polished brass hardware on an insulated base
Two 4mm shrouded binding posts
Technical Specifications
Specification
Value
Ways
One
Plug
Tapered brass, insulated handle
Hardware
Polished brass
Terminals
Two 4mm shrouded binding posts
About This Product
The plug key is the simplest on-off control for a school circuit: push the plug in to close it and pull it out to break it. It is used to switch cells, resistors and meters in and out during Ohm’s law and bridge practicals.
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