Review on 🔩 Screw Checkr: Enhanced Thread Gauge Verification Tool by Mark Lowery

I have purchased both metric and fractional versions of this tool. Before purchasing these very high quality tools, I relied on a #185 Starrett drill bit, a tap, and a wire gauge to help me figure out the small machine screws. The Starrett tool doesn't have threaded holes, so once I found the diameter I had to use a thread gauge to determine the number of threads and then go to the 6 inch rule to get the length. NOW VERY EASY to just place the machine. Screw in a hole of the diameter you want on the left, then find the threaded hole you want on the right, screw it in and you've determined the machine screw you're holding. The fractional model goes from size #1 to 5/16. " and also has a ruler engraved on the top edge so you can quickly check screw length. I will still use the Starrett for checking pins and for various other purposes, but for quickly checking the diameter, thread and length of Machine screws like break bolts, and metric, I will use these devices to check the bolts.