Thin sheets of metal, plastic, or other materials can be clamped together from one side, by means of blind rivets, better known as pop rivets. A tubular rivet is inserted in a hole which is drilled onto two sheets. It is then clinched by withdrawing a nail found inside the rivet. These fasteners are installed with a manual, pneumatic or electric rivet gun, to connect metal and other pieces together. Closed-end rivets are different from others, because their nail does not go right through the head. Its nail is soldered on to the inside of the head so as not perforate the end of the head. As a matter of fact, a hole is not left behind, when the nail is drawn. These rivets are mostly used in jobs where air and water are prevented from getting through.