I purchased these Stabilicers to replace another brand, before they completely wore out and for a safety gain.

FIRST IMPRESSION
These Stabilicers appear to be well made and simple. I like the layout of the screws on the bottom around the perimeter, for my intended use for edge grip. I like that the screws are replaceable and somewhat low profile and not long sharp spikes, for my use.  The screws on this style have the standard sheet metal thread, but are supposed to be hardened for wear.

FIRST USE
So far, the screws seem to wear pretty well and dig into ice well and are aggressive on surfaces other than cement so take them off outside.

FIT
The medium stabilicers say they fit men's 8-10 and measure 12" in length. The medium fit most all of my men's size 9 boots just right and even have a little room to spare. Most of my boot outsoles measure between 11.5" and 12" long.

OTHER DESIGNS
I like the other styles with the tiny carbide spikes such as the Dry Guy brand. They all have the spikes in the center and not on the outer edges and the straps make ground contact and wear faster than they should, don't get me wrong I like them for flat surfaces and lower price.

Kahtoola Microspikes are a crampon style with 1/2" to 3/4" long spikes which are more in the midline of the sole as well and have chains which wrap around the edges of the sole. They work a little better in deeper snow while hiking and many off road conditions and are lighter weight. They work really well.

STABILICERS SCREWS
Stabilicers has replacement screws which make them a better value.

ICE RACING SCREWS
Kold Kutter brand and others make screws for installing on your own tires or boots, if the soles are thick enough. They are very similar and likely the same if not better than Stabilicers.

REGULAR SHEET METAL SCREWS
Regular sheet metal screws are cheaper but would wear out much more quickly and rust.