Blinds in modern interiors gradually replaces curtains - they do not collect dust, are comfortable in cleaning, practical and long lasting, they do not give a sense of smoothness and refresh the rooms, giving them sophistication and coziness. Blinds are one of the types of window fasteners made of adjustable fabric, wood, plastic or metal sheets. For horizontal blinds, the so-called "step system" is used to open or close blinds with a special swivel mechanism, with its lifting chain necessary for the locking position of the blind, but the stalk to cut the trim. Steering system "spoke-chain" is typical of standard collector blinds. In more advanced systems, the management takes place with a one-circuit mechanism, which is responsible for their turn, as well as for their movement and self-locking.