Convert your existing locks to Matrix by simply replacing the cylinders.
The 'cylinder' is where the key goes in, it contains all the tumblers, pins, springs.
Most commercial quality locks are compatible with Matrix cylinders, however cheap hardware-store brands such as Lane and Gainsborough are not. Matrix cylinders are designed to last a lifetime, so using high-quality locks just makes sense.
The difficulty of replacing the cylinder is dependent on the type of lock. Many are quite simple, requiring just a screwdriver and basic skills, others are near impossible without the right tools and training. We have various training videos to help with DIY installation.