Functioning - The SXR is suitable for push-through installation. - The SXR expands in solid building materials and knots in hollow building materials. - With vertically perforated bricks, only use rotary drilling (no impact drilling). - Countersunk head screws are recommended for the installation of timber constructions in the case of metal constructions, use plugs with a wide sleeve rim and a moulded washer on the screw, which also features an integrated hexagon socket.