You're better off putting studs in the front wheels, no risk of damage and they grip the ice like you're on dry pavement. You can use 1/2" sheet metal screws, however, if you buy the actual ice screws made for the job they work much better, last longer, and they stay in better. You can also put more or less in for more or less traction. I like them for my 2wd quad on the ice because it's all about getting sideways, all the time. If you put too many in the tires, they grip too well.