Abstract: Apparatus and method for forming external raised beads on hollow rigid tubing. The apparatus includes an adjusting screw threadably mounted into a threaded body member having one or more balls mounted in apertures in the body member. The body member is inserted into one end of the hollow tubing, the balls being disposed inside of the body member between a reduced diameter portion of the screw and the inner wall of the body member. When the screw is threaded into the body member, the balls are forced outwardly against the inner wall of the tubing forming a raised bead on the exterior of the tubing. Continued rotation of the screw and body member increases the height of the bead.