Winkhaus Thunderbolt 5 Dead Bolt Door Lock 45mm Backset 16mm Wide Radius Faceplate Split Spindle TFA 1670. This is the latest Winkhaus security door lock with a 45mm backset and 16mm wide faceplate with rounded radius ends top and bottom that is used to fit a Composite or Upvc door sash & built to ensure that it provides a smooth operation whilst providing enhanched security to suit modern composite, timber and Upvc residential door systems.
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