By using reliable springs, the wires can be held in place so that they are easy to use, resistant to vibration, resistant to loosening, and long-lasting.
It is a simple matter of wedging a screwdriver into the appropriate indentation hole to easily pry it open and insert the wire. Once the wires are in place, remove the screwdriver and the spring will snap back to tightly hold the wires in place.
Types of Screwless Terminal Blocks: