Double seaming uses rollers to shape the can, lid and the final double seam. Overlock stitches are traditionally used for edging and light seaming. Strapless bras rely on an underwire and additional seaming and stiffening panels to support them. Wirefree or softcup bras have additional seaming and internal reinforcement. Craig had particular trouble against off cutters on the seaming pitches. They are usually squared off and are characterized by seaming. Stoating would also be used in place of seaming on heavy furs. In some seaming machines, this is done as the can is turning at high speed. These pieces are assembled into the final size by seaming. The seaming or joining of geonets is difficult. Seaming is a process of folding two sheets of metal together to form a joint.