Fas101 abus attachment window fixes the hinge side. you have to fix the handle side separately. when opening the window, the fas101 only rotates with it, the locking bolt must be unlocked before tilting. after tilting the window, the bolt must be pressed again. will mold hinge side protection mounted on window sash and frame. thanks to its narrow structure, fas101 can also be used in installation conditions. to fix the hinge side slim construction, especially for tight installation conditions convenient operation with safety bolts, no key required pressure resistance against the arms is over 1 ton Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.