Businesses in the sewing machines category sell equipment and supplies for sewing, dressmaking, quilting and other textile work. They may offer domestic machines for occasional or regular home use, as well as heavier-duty models for frequent sewing or small-scale production. Common products include mechanical and computerised sewing machines, overlockers, embroidery machines, replacement needles, bobbins, presser feet, thread and machine accessories. Some retailers also stock fabric, patterns and other sewing materials. Many businesses provide advice on choosing a machine, demonstrations and guidance on its settings and features. Services may include delivery, setup, user instruction, maintenance, fault diagnosis and repairs. Technicians can inspect machines, clean and adjust mechanisms, replace worn or damaged parts, and address problems such as skipped stitches or uneven tension.