This system is essential and very specially for the Lascal Stair. We have a Kenngot-stairs in the house. This is an open staircase. Sidewalls there on top of the stairs and we could not attach no child protection device on the stairs if we had not found this system of Lascal. So everything works just fine, even if you have to spend a few euros more than for conventional stair gates, the product is worth its price.