Toe punching and web splitting is a great way to permanently mark chicks. The equipment is inexpensive, and if you combine toe punching with nose or nostril notching there are many combinations of marks. However you really need to confine your newly marked peeps to such time as the scab falls off the web of it's foot to be sure that the wee hole in the web hasn't grown up.
I don't know why or to what ends you want to mark your chicks but I also recommend that you wing band your birds in the webbing of their wings once the chicks reach about 4 to 6 weeks old and are ready to run with the rest of your flock.
Don't forget to record the toe marks and wing band numbers in a good note book. It is possible to become confused and make a year or years mistake in the reading of a toe mark but when backed up with a wing band that problem goes away.