Lockwood extension guide

The table below shows the parts required for particular lengths

Overall cylinder length required	Cylinder projection	Door thickness	Extended base cylinder	7mm extension kit	10mm extension kit	24mm extension kit	32mm screw	42mm screw	65mm screw
41mm	43mm	49mm - 63mm	1	1			2
50mm	53mm	63mm - 83mm	1	1	1		2
61mm	63mm	83mm - 103mm	1	1	2			2
65mm	67mm	93mm - 98mm	1	1		1		2
72mm	74mm	103mm - 123mm	1	2		1			2
82mm	84mm	123mm - 143mm	1			2			2
92mm	94mm	143mm - 163mm	1		1	2			2

Modular Cylinder Extensions