Yes, you can, but we don’t recommend it.  Wrap insulation tape around the shaft if you need to improvise for a one-off electrical job. Overlap the tape by at least half its width to ensure complete coverage and then repeat with another layer, staggering the joints. Manufacturers typically make handles from non-conductive materials, so if your screwdriver has a plastic or rubber handle, you needn’t do any more to make it safe. Use with extra caution. You can easily damage the tape and expose the bare metal with one slip. It’s always better to use a proper VDE-tested screwdriver.