Make about a 3/4″ slice with the small blade then hook in the larger one. The trick to it, and the hardest part too, is to hook into only ONE layer of plastic. On some packages this is easiest on the “bubble” part of the package, not an edge. After that, its very easy to use. If you need to get documentation out, it’s then much easier to get that single layer near the edges after you’ve cut out the item from the bubble. Neatness does not have to count.

I’ve had three of these and eventually lost or misplaced two. On this last one, I broke the plastic on it’s “lower jaw” after two or three years of use and abuse, but it seemed to be starting to getting dull anyway. After all, it’s basically just utility knife blades in a fancy handle and they all will eventually get dull. It’s still usable but not as safely, so I am ordering a couple more. Fortunately they’re pretty cheap and well worth the price.

The only downsides are that the handle could be more sturdy, and the case isn’t very rugged, so be careful about getting it dirty or dropping down the balance board when in the case.