Really cool long scraper for algae and aquarium glass it works with regular razor blades and you should totally print it and boost it too! also if the blade doesnt slide into place straight off the printer you can use the blade to cut the slot and make it fit. or you can rotate the model to a more vulnerable position if you care so much. I would also recommend gluing it in place for safety but then you can't swap the blade so dont let it get rusty.