Irwin Industrial Drywall Fixed Utility Knife

I'm a Union Journey Framer/Drywaller in the Bay Area. All I've been able to find until this knife were chunky/heavy/stubby knives. With this knife I can firmly pinch the tape right against the blade for accurate consistent cuts. It's light, so it doesn't add a lot to my overall bag weight throughout the day. It's easily half the weight of any Stanley you can find on the rack.The only thing I would modify is the notches that hold the blade in place. I'd really like to have more exposed blade. It feels a bit recessed. I know that some blades (Lennox) have an extra punchout in the blade so you can get a lot more length. The problem IS, that most contractors buy the cheapest garbage blades to give out. If you could improve this, that would be great. Quite frankly I don't know why the other comments are so negative?

Bought this knife over a decade ago, lasted the entire time with daily use cutting Plasterboard. Great design, worked great in combination with a tape for cross cutting. Only failed once so many blades had been through it the lugs holding the blade in wore through. Sadly seems like this has been discontinued at least in Australia. Would like to get my hands on another.