Review (3/5): Does what it says but a bit pricey
Steripod's Clip-On Razor Protector comes in a two-pack and was designed to fit 'most' razors. Inside the clip is a zinc strip Steripod claims keeps razors sharper longer.
In my usage, it works both as a way to secure my blades while commuting/traveling and extends their life by a shave or two.
What I liked about this protector is that it worked with my Gillette Fusion 5 blade. It is a tight fit but a fit nonetheless. It also keeps the blades sharper for longer. For example, I typically get 2-3 shaves out of a cartridge before it begins to pinch so much I have to replace it. With the Steripod attached I have been consistently able to get an extra shave, sometimes two out of it.
What I liked least about this protector was that any pressure or movement can unseat the blade from the pod. This is why I can't consistently extend my blades longer. I shave in the gym and one razor remains in my gym bag at all times. While en route I have often found my blades have either lost contact with the zinc strip or the entire blade has slipped out of the clip. Either way, I lose the benefit of this offering due to it being designed better for smaller blades than larger ones. I also felt it was a bit overpriced.
Overall, while this product works it's really intended for use with razors that only two or three thin blades. If your preferred razor is a bit larger it may not fit securely in these pods and this becomes an issue, particularly if/when in transit. 3 out of 5 rating for a Steripods product that was well conceived but lacked the execution to work for some users.