Mobile Key Cutting Machines
At first these may seem desirable to the newbie as they are relatively cheap and can often cut both cylinder and mortice keys. However, they are only designed to be a back-up machine for mobile locksmiths when they are stuck out on a job and need to cut an extra key.
The reason for this is that they usually need the user to change both the tracer point and cutter between cutting mortice and cylinder keys. Also, if they are hand cranked models. So are often labour intensive and time consuming.