Where some hinge systems do not feature an integral restrictor, the Titon restrictor range gives the customer a choice of different designs to suit various applications and window opening types.
Most can be retrofitted to give an existing window that extra level of safety when not originally specified.
Some models do require key operation, some can be released by hand. It should be noted that none of the restrictors are classed as 'child proof', as no -one can legislate for all accidental operation.
Titon recommend close scrutiny of British Standard when specifying these products due to the risk involved in selecting the wrong product for the wrong purpose.