This popular fastener incorporates smooth contemporary styling and offers extra security and strength. Avon timber is supplied complete with a tongue and keeper arrangement specifically designed to meet the needs of wooden joinery Suitability - Suitable for use on residential awning and casement windows. Available in left and right handed models. Available in locking or non-lock models. 17mm backset. Fixing Surface - Timber Finishes - Satin Chrome, Powdercoat, Special Colours