I love the blade support slider, it makes it easier to cut foam board, insulation, or trim expanding foam. Considering Knipex has an MSRP close to $60, I found the price from KTOOL to be reasonable.

The Knipex Cutix is one of the best utility knives on the market - the stabilizing bar is the key difference to keep the blade rigid while cutting deep (think insulation, foam board,etc...). The snap off blades means you will always have a sharp point available. The knife stores two extra blades on board. The knife is also very light weight and slim and the handle has a texture to it that helps you grip it. I like the sliding mechanism so that you can expose a small tip for cutting tape on boxes or clam shell packaging. All in all this is a great utility knife and worth every penny - I actually have a few of these so that they are within easy reach. Highly recommended!

Beautiful Knipex quality as one would expect, the stabilizer bar is a clever and very useful innovation, particularly for my leathercrafting hobby where precision is key. Highly recommend!