b’Geepas High Security 2 Cylinder – Anti Snap Lock cylinder lock by using simple DIY tools. This Snap Secure Lock is the only lock available with patented snap secure technology which will effectively lock the central cam in place. The snap secure technology totally blocks access to the door lock case and totally blocks a snapping attack. The snap-safe anti-bump profile cylinder is highly secured. Keys: Comes with 3 Keys per cylinder.This is important as your main entrance/exit cannot be further secured by Sash Jammers when you are out of the house. If security protection is an issue then do not compromise, this lock is highly engineered and highly recommended. Introducing The Most Secure Lock Measurements are taken to the center screw on this lock.’