Review on 🧹 HFS Utility Vacuum Pressure Blk Steel: Ultimate Cleaning Power for All Surfaces by Balthazar Cooper

I wasn't expecting 100% accuracy for $7.50 but I expected them to read roughly the same gauge. I was wrong! I ordered four of these to make a carb sync tool. When I opened the boxes only 1 out of 4 showed zero with no load. The other three had 3 different indications. I spent an hour taking it apart and trying to get it to read zero and still respond to a small vacuum load. I never managed to get all 4 to read the same under constant load. I gave up. I will order something from another source and see if I can get a quality product. Obviously they are not factory tested!