The two square holes on a USB stick/connector are crucial for ensuring a secure, firm connection to devices. USB Type-A connectors use spring-loaded clips that engage with the square holes to secure ...

Typical spring clips are self-retaining, one-piece fasteners that slip into a mounting hole or onto a flange or panel edge. Secondary fastening devices such as rivets, studs, or screws are not needed ...

Carabiners—D-shaped rings with spring-loaded clips that climbers use—have become more popular for everyday use, like clipping keys, water bottles, or even USB drives to your backpack or gear. The Cool ...