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Choosing the Right UPVC Door Handle Replacement It's easy to replace your upvc handles however, choosing the correct handle can be a challenge. The majority of modern double-glazed handles come with spring cassettes in them but older ones don't. If your upvc handle is loose and floppy there may be an issue with the internal parts of the multipoint lock. This article will cover the various possible issues their causes. Handles that sag or droop UPVC handles are susceptible to wear