Gainsborough Black Yarra Ridge Sliding Patio Door Double Cylinder Deadlock

Key details: Twin counteracting beaks engage an all-metal catch plate, providing resistance to jemmying and restraining the door against being lifted from its rails; Fits Industry-standard three-hole door cutouts (three 9mm diameter holes); Fits wide range of door stile thicknesses from 21.3mm to 46.4mm; Suits left-closing and right-closing doors (lock is not handed); Australian design and manufacture; Reliable all-metal lock for aluminium and timber sliding doors. Once the door is closed, the twin beaks are operated by key or lever to engage the catch plate.