Alcoa Fastening Systems offers the Marson brand Matco SHR-1 riveter for limited access applications that, according to the company, manual riveters cannot handle. This new tool: Is lightweight, weighing only 1.2 lbs. Features a 360 degree swivel head that ratchets into over 40 different positions. Is designed to install up to 3/16" aluminum and steel rivets. Is made from steel and cast aluminum.