Al's commentary in another thread open the door for this one.

What Hackle Gauge do you use and why?

I personally chose the Al Troth model called a HACKLEMASTER.

I liked the compact nature of the device. I have the ability due to the design of the backing on the gauge to fit it into the jaws of a vise and to sort through a neck sizing hackle while placing into neat compartment trays according to size.

I like the background color of the gauge which itself is white therefore making the visual detection of where the fibers "tip" on the gauge easier detectable by my own eyes.

Furthermore, the hackle gauge measures hackles which I would use for my tying purposes from a size 4 down to a 24.

I also chose this style for the fact after I owned one that slipped over the vise stem and supposedly swung out of the way when not needed, it seemed after staring at it while looking down, for whatever time it took to pluck and size a neck, that I developed a stiff neck.