Workers in this unit group cut, fit and set glass in windows, doors, shop fronts and other frames. Their functions include; selecting glass panes or cutting panes to measure and fixing them in windows, doors and partitions of buildings; fastening glass panes into puttyless rooflights; installing flat and curved plate glass in shop fronts, swing doors, show-cases, portholes or other openings; cutting, assembling and installing pieces of glass in lead or copper framework to form decorative windows and panels; installing ordinary and shatter-proof glass panels in windows, doors and windscreens of vehicles; performing related tasks.