are essentially are solid rivets,with a shallow hole at the tip, opposite the head.
This hole causes the tubular portion of the rivet (around the hole) to roll outward when force is applied.
Tubular rivets are often the preferred rivet style for joints where movement is required (pivot points), because the rivet material only swells at the tail.
Common applications for tubular rivets include light fixtures, HVAC ducts, electronics, ladders, and brakes, among many others.