Overall this line is amazing. This is a durable aluminum ruler with a solid smooth metal joint. The edges are sharp, so you can make sure the entire line is straight by unfolding the ruler. The mark is not erased and the print is clear and clean. Just a complaint? Using it as a ruler (which I mostly do) is a little tricky because it's slippery at the bottom. Solution? Press hard. Overall I liked this purchase. Yes, $10 is a bit much, but honestly, it's going to last a long time if you care.