Kwikset - SmartKey SC1 Schlage Cylinder For Single Cylinder & Electronic Deadbolt - Silver Finish Other Locks tap the four corner holes

tap the four corner holes 10-32

If the end of the plug of the old lock looks like the one in the picture below our C-19-121 will not work

Easily Program with Lonsdor

Door Thickness For 4300

5S Full Flex SW Package – SLAVE Slave BUY HERE FLS0

Kwikset - SmartKey SC1 Schlage Cylinder For Single Cylinder & Electronic Deadbolt - Silver Finish Other Locks tap the four corner holesSmartKey Cylinder that fits Single Cylinder and Electronic Deadbolts. With Kwikset SmartKey you never have to worry about an intruder finding lost or stolen keys again. Kwikset prides themselves on creating ANSI Graded bump guard protected high security door hardware you can trust to be drill and pick resistant. Re key your SmartKey locks as frequently as you wish while maintaining the highest level of security. This cylinder allows you to turn your