2" - 6" Bore Gauge 0.0005" Increment Set

Used these to check the bore of my block. Works as intended. Learn how these work and how to read them prior to buying it for best results. I used it verify the bore was straight during a rebuild, and it was accurate enough for me to verify I could skip going to the machine shop to have the holes honed. Comes in a nice hard case. Lives in my toolbox now. Excellent value for what you get. Would buy again.

Worked great and accurate to help my size up my cylinders and helped me realized that they definitely needed and overbore. Was definitely worth the money.

This was simple to use and there are plenty of videos online to give you the basics. Be careful to keep track of the small spacers. Take your time accurately setting zero for the cylinder specifications of the cylinders you are measuring and then this tool can quickly be move around to different positions in the cylinders. You need an accurate outside micrometer to set the dial to zero. A simple inside micrometer can be use to measure cylinders but this is easier and faster. I used the bore gauge an inside micrometer an outside micrometer and a digital caliper against each other. For the cost this tool is accurate has a decent case and will do the job. I use it to make decisions prior to committing to have machine work performed on cylinder blocks not as a replacement for measurements and inspection taken at the machine shop.

Pretty inexpensive so I wasn’t expecting much. Out of the box it doesn’t operate smoothly. If you break it down and polish the linkages it’ll work flawlessly.

Works fine

Used it to check bore sizing on engine blocks for rebuilds. Checked against my micrometers it was pretty consistent and accurate.

I bought this to measure cylinder bores and it is clear why people use it for engine rebuilds. The kit covers a useful range, comes with multiple anvils/spacers, and the case keeps everything organized. Once it is set up, it can be quick to check different points in a bore. That said, it was not the right tool for my situation. Getting it zeroed and keeping readings consistent took more time and fussing than I expected, and I struggled to get repeatable measurements without already having the right supporting tools and a very steady technique. For someone rebuilding engines regularly and already set up with the proper micrometer and experience, this can be a good value. If you want something more plug-and-play or you only need occasional measurements, you may end up disappointed like I was.

Find this to be very useful. Works well for my limited used checking behind the machine shop. Already saved me from improperly sized rods after ARP rod bolt replacement.

The bore gauge contact point sticks and will not move without being pushed back by the indicator. Completely unfit for purpose. Do yourself a favor and buy a higher end one. This one is completely unusable.

Needed to rebuild lower section to get the moving anvil to free up. Case needs to be heavier so it doesnt flip over backwards. When this happens all the anvils fall out on bench. Other than that, fast shipping and works great.