iGaging Caliper Depth Base T-Bar Attachment for Dial/Digital/Vernier Calipers 4", 6", 8", 12"

Mine showed up square, only complaint is that the screw was cut at a heavy angle. Chucked it up in a drill and pointed it with a sander in a few seconds to fix that issue. Fits great on my Starrett 799.

To get it done I took a piece of 1/4" steel plate and put two holes in it so I could bolt it to the housing to give me a stable platform to measure from. Using my dial caliper I used the depth side to take the measurement using this to give the caliper stability on the plate. Worked like a charm! Gave me the reading I wanted, make the necessary adjustment with shims and done and back on the track. If you done have hundreds of dollars for the professional pinion depth gauge tools, this will work very well.

Finish is a little rough but the reference surfaces appear to be square to each other and flat as far as I can tell with what tools I have available to me. That is the only thing I cared about when I bought this. Would buy again if I needed another. Would have preferred a brass or brass-tipped screw and would have looked much nicer if they used even debur/chamfering instead of a belt sander.

Adds stability to depth measurements which the basic calipers were not designed for. The butt end of these are not flat and rock side-to-side. This very inexpensive "foot" greatly extends the utility of any quality caliper creating a high quality depth guage.

Digital calipers as a depth gage are actually very accurate but they have to be perfectly perpendicular. This gives you much much more repeatable measurements and repeatability and accuracy go hand and hand!!! Is it perfect, now..a depth mic is still the go to tool,for sub .001" measurements or even sub .003" but this works for all else!! Just make sure u put it on proper!! Set calipers vertical to depth check on flat surface(ground steel or granite if available)and when it is bottomed out install this. Make sure the fixed side opposite the set screw is completly against the calipers. Tighten set screw and reference a 123 block or gage block. Thats it.., it takes maybe 30 seconds.

If you don't need super precise accuracy, adding this to your dial or digital calipers is a viable alternative to as separate anvil gage. I'm not a machinist but I regularly use this to measure pin protrusion in certain sporting goods that have a reputation for ill intent with certain folks. Again it's not super precise but gets the job done for me.

I was hoping for something better. The one I received is 18 thou over 5/8" with makes for a pretty loose fit on my calipers. All of my calipers are with 2-3 thou of 5/8" and I guess I'm not sure what the industry range is, but it just seems way to loose to me. The thumb screw locks the caliper rail against one wall of the fitting, but I had had to remove the screw to shape and polish the end. It always wanted to twist the caliper rail out of the position with the wonky screw head that was delivered to me. The base of the unit I received is not super flat. Noticeable wobble on the surface plate. I didn't measure it, but guessing a couple thou of twist here. Not too surprising really, since asking the piece to keep flatness over a rather thin arch of metal is a bit much. Wish they made something thicker and more stable. I'll probably keep this, as it serves its general purpose and will be fine for quick caliper measurements. Just not overly impressed.

Nice fit caliper get accurate reading

Fantastic item. Adds so much versatility to my caliper.

A bit loose but works.

Really poor quality the one I got now, machining on it was like someone made it with a grinder, expected better quality control from iGauging. I bought one few years back and it was perfect, but now, had to return it..