From the inside Ecotilt™ retains its looks thanks to the patented Boston Hinge. The hinge is attached to traditionally styled staff beads which retain the sash in the jamb and cover the hi-tech weatherstripping. When unscrewed, the Boston Hinge allows the staff bead to be opened outwards so the tilt and removal function of the sash can take place. The hinge itself is made to a high quality brass finish.