The upper striker features an anti-lifting device. The bogie with its ball bearing-mounted roller and a plastic sleeve provides for easy operation. The big brother ATRIUM® S 300 is a slide fitting for elements made of wood, PVC or light metal with brush seals or threshold seals. Bogies with 2 large rollers from the ATRIUM® HS range ensure that the sash, which may weigh up to 300 kg, can be easily slid. Various drive gear designs, matched to the relevant sash weights, with up to four locking points hold the sash securely in its closed position. Extremely simple operation a quick turn of the handle unlocks the drive gear, enabling the sash to be slid with minimum effort thanks to the outstanding rollers.