Roberts #10095 Backerboard Knife

I needed a scoring knife for Hardie Board and decided to try one with hardly any reviews. I also bought one at HD to compare with. At first, I thought the handle was ridiculously big but it turned out not to be an issue. It's very sturdy and scores very well. Compared to the one from HD (HDX brand or something) this worked 10x better. It really removes the board and gets into it. The other was more like a dull razor and was very uncomfortable with its plastic handle. This one has a rubberized and comfortable grip. I highly recommend.

Used to cut concrete backer board for a large project. The knife worked perfectly. It cut very cleanly. It was easy to hold thanks to the hand guard. It did not dull at all after many cuts. About as good as any tool could perform. Very reasonable price. Great product.

Love the way it protects your hands while it scores the board perfectly.

As described. If you need one get one.