Pack of each of 100 Serrated Driver pins and Spooled Driver pins. I'm often asked for both types of driver pins. Security Drivers are one of the easiest ways to make many brands of residential and commercial pin tumbler locks harder to pick or bump. Most locks require 5 or 6 driver pins per cylinder. There is a separate listing for security drivers with springs. Locks must be taken apart to install these driver pins, so they are intended for use by people know how to rekey and service locks. They cannot be installed without disassembling your lock! Pin colors and packaging may vary from photos.