The Winkhaus OBV restrictor is designed to help prevent small children opening windows fully and falling out. The restrictor automatically restricts the opening of windows greater than 50mm-100mm. It also prevents windows from slamming shut. Restrictors are surface mounted vertically or horizontally on both outward and inward opening windows, and can be easily retrofitted to existing windows as an additional security and safety device. Restricts the opening distance in the turn position to approximately 50 mm if mounted on the lock side, and when mounted horizontally, variable opening distances can be achieved The OBV locking bar can be released for full operation of the sash by keeping the push button depressed .Automatic locking; when the window is closed from the turn position the limit opening function re-engages. Prevents windows from slamming shut. Can be retrofitted to existing windows as an additional security and safety device. Easily fitted using 5 screws. The steel hook is fixed with three screws. Maintenance friendly as frame section can be adjusted within a range of +3mm. Extensive range of angle packers available to allow fitting to PVCu windows. Conforms to BS6375 part 2: Load bearing capability of Safety Devices. An excellent safety product.
