Crafted from three inner rings of pure copper wire and seven outer rings of beryllium bronze wire, twisted in reverse and fused into a bundle. One end inserted into a sleeve while the other end features a thickened and raised tip. The middle section of the pin protrudes, with the outer circle's diameter larger than the inner diameter of the contact hole, establishing a seven-point secure contact.

High-reliability socket components utilized in electrical connectors and inserts. Composed of multiple elastic gold-plated or silver-plated metal wires arranged in a single-leaved, rotating double-hyperboloid configuration, forming an angle with the inner sleeve's direct axis.