New Sktlight mechanism Quasar Bow Chain opening mechanism for outward-opening windows QUASAR BOW CHAIN Especially for smoke ventilation, wide opening angle represents a big advantage in order to reduce the number of openable windows, according to the required geometrical free area. QUASAR BOW CHAIN has been designed for installation on side hung windows opening inwards or outwards, increasing the opening angle up to 90°. QUASAR BOW CHAIN... View