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Usually the part on your Patio Drive Mechanism that breaks is the cast where the handle goes in.This drives the full locking gear and enables your door to lock.
If you look at the front of your existing drive gear you will see some writing on it which corresponds to the item part number you order. The picture below shows the writing on the front of a sigienia Tilt and Slide mechanism.
SI = Sigienia (the manufacturer)
FFH = the size of the opening you door fits into.
So if yours was the one in the picture below you would pick SIG3 on our site order page
IF your patio drive gear does not correspond to any we sell please use the form below to contact ‘Dylan’ our service engineer who will endeavour to talk you through identifying the mechanism you may need.
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