Beslands 6 Pc Telescoping Gage Set, 5/16" - 6" Range, T-Bore Hole Gauges w/Pouch, High Precision Telescopic Bore Gauge T-Gage Set (5/16" to 6")

They worked great easy to tighten, no slipping

A machinist best tool

These are far from professional grade, but still get the job done for a home or hobby use. At this price point they are a great deal.

A nice addition to my tool collection. This gives me the ability to accurately measure internal diameters that I previously had no suitable tool for. Of course, you will need a 0“ to 1” micrometer (or other similar tool) to read the results. I’ve found these easy to use and they give a repeatable measurement once you develop a feel for using them - pretty straightforward.

They are exactly as described and work for a quick measurement where inside micrometers would take longer

These are great for doing deep inside measurements of most everything. I used them for checking Engine Cylinder bore diameter and uneven wear throughout the cylinders on older vintage engines. Follow up with a micrometer to get an exact reading. Excellent for anything requiring an inside bore measurement especially deep inside highly recommended. Fast delivery too!

I thought the contact points would be much thinner. because if thick there could actually be a difference between 1 side of the contact point and the other side. especially in a graduating slope such as in a shotgun barrel manufactured with a full choke. lead shot is illegal to use while waterfowl hunting. and steel shot is dangerous if used in a barrel manufactured in full choke. so, my old Marlin Goose Gun is useless until I cut the choke in the barrel back to the point that the choke is at the modified point in the barrel. you can imagine that I've put a lot of thought into the measurement that I'm going to tell the gunsmith to cut the barrel back to. as of now the measurement is 1 and 3/4 inches off the tip of the barrel.

Was a little crunchy at first but seemed to go away with use. Good budget set