Here is a link to the Sizzix Quilting site.
http://www.sizzix.com/shop/sizzixquilting
Select the die you are interested in. A larger image will appear, under the image there are 3 hot spot squares. The rightmost one will show you the exact outline of the blades. You can easily see notches and clipped corners. A quick look shows that the HST's have clipped corners, but the drunkard's path curved dies do not have the center notches for matching. I actually have been looking at this brand for the Drunkard's path dies. Accucut has them grouped together on a single die, which makes it hard to cut because you often want to cut the pie pieces all one color and the "L" shapes all the other. Sizziz DP dies are two separate dies.