Converting a 10A supply into a 16A appliance
A 10 amp 240V supply can only deliver 2400 watts. If I assume the tool is rated for 240V and draws 16 amp, it would need a maximum of 3840 watts. The rating of 3500W may be because the tool does not have a power factor of 1.  In any case, a converter can only change one voltage into another (or change AC to DC); it cannot increase the wattage capacity of your main supply. Depending on the type of tool, you could damage it if the proper power is not applied.  There certainly is a good chance you will blow the main supply fuse or circuit breaker.