I paid about $90 for these junk tips, they look sick but they're "stainless steel" and I only have them on my car, maybe already have one Rusted to shit inside for a month and this orange rust liquid just runs all over my BRAND NEW WINDOWS. I haven't cleaned the discs yet, as I just noticed on startup, but it's better that the discs don't get smudged. If anyone has any questions about this, let me know and I will answer.