Industrial quality 3" wide stainless steel blade, ergonomically designed for the hand. •Won’t scratch acrylic or glass like metal blades do! •Soft enough to reach into and clean out previously scratched glass or acrylic. •Will clean out algae that naturally grows in such scratches! •Won’t cut the user, even if just carried in your pocket! •Effective on even the most stubborn deposits! Available with plastic or stainless steel blade.