Winco KFP-123 Acero Round Diamond Sharpening Steel 12"

Good for restoring really dull edges!
First of all, Before purchasing, make sure to look at this Winco's Oval Diamond steel below. Same price, but it will be a better fit for most situations due to its finer grit and ability to accommodate larger knives.
https://www.tigerchef.com/winco-kfp-122-acero-oval-diamond-sharpening-steel-12andquot.html

Now on to the review.
This is a sturdy steel that works well for restoring very dull edges. It's affordable, but well-made - the surface is consistent. There are no dings or bumps, which may damage the edge.

The texture is coarser than I would recommend for regular maintenance of kitchen knives. It's really just for restoring knives that are very dull. The surface has very fine horizontal grooves underneath the diamond powder coat which has the effect of increasing the coarseness.
After using this diamond steel, I would suggest following up with a regular honing steel to polish out the micro-serrations.

Specs:
Material: Diamond coated steel rod
Overall length: 17 inch
Sharpening surface length: 11 inch
Coarseness: Medium-Coarse

Functionality: 5/5
+Medium-Coarse grit. Specs are not listed, but I would approximate #300-400
+surface is consistent. Sometimes with diamond steels, there are coarse imperfections that interfere with sharpening. But this item is consistent throughout.
+solid steel core makes the steel feel sturdy
+comfortable handle
+metal loop on handle for storage
+suitable for knives with edges up to 9"


Fit and Finish: 5/5
+no dents, scratches, imperfections, ... Ready to use out of box.
-packaging is a little tricky to open. Patiently cut around it to avoid having to clean plastic shavings from the steel later.

Value: 5/5
+Very affordable