Answer:
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I am the second L in LOL.
Though it be cold, I wear no clothes. The frost and snow I never fear. I value neither shoes nor hose and yet I wander far and near. What am I?
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
When it comes to me you go on red and stop on green.
I always have to work with something in my eye. What am I?