Review on X ACTO XZ3601 Knife - Enhanced Safety for Precision Cutting by Greg Baker

Blade kept falling off even on first use. I just cut a circle out of cake cardboard. At first I thought that maybe it wasn't assembled properly and that's why the blade wasn't attached properly. After every possible adjustment, the blade kept falling out of the notch during cutting. The blade stays attached for less than 10 seconds during use. I had to hold the blade in hand to finish cutting the thin cardboard. NOT SURE. "Security" cap is a joke. If you close it with the blade parallel to the cap, it's free enough to fall (if you hold the "handle" upside down, the cap will fall as if it were just put on it). So you need to adjust it so that the blade and cap are at an angle. This way the lid will be secure so it won't fall off BUT the blade will get stuck in the lid if you are unlucky enough to not get out of the lid. Zero star rating is not an option, $5 lost.