So far I have had two of these. The first one got old and showed heavy wear and tear so I decided it was time for a new one. Was very happy with how long it lasted! Unfortunately, the second one didn't last as long as the quick blade change design failed and the blade would come out with any use of pressure. It ended up coming out in my pocket and slicing my finger. Tried to salvage it but it was no use.

Received the razor knife as a gift and was so impressed that I immediately purchased 3 more and gave them to my friends as gifts. High quality, very ergo metric with different cutting angles. Designed with the ability to change blades without the need for a screw driver. Great price for such a well made tool.