Springs make it easy to stretch the guards over your blades to put them on and take them off, and also hold the guards in place while you walk.
Top Notch deisgn is easier to cut to size
If your blades are longer than 12 inches, you will either have a larger gap between guard pieces or you can get a second pair and cut them to make 3-piece guards. Blades shorter than 6 inches will likely not work with these guards.
1. The dog was chasing the cat.
2. The cat was being chased by the dog.
3. A car crashed into a tree.
4. A tree was hit by a car.
Assembled guards are 12.5 inches long end to end, and can be cut to any length down to 6 inches