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Choosing a Double Glazing Window Handle Window handles are available in a variety of styles. They are usually uPVC however they can also be aluminum or timber. They can be cranked, key locking or cockspur. The most commonly used uPVC window handles are Espagnolette handles. They have a square spindle at the back that goes into the gear box of the lock inside the window frame. UPVC It is essential to choose the right size and style of UPVC double-glazing window handles for your w
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