Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor quality insert.

I have two problems with this insert and I consider them very important. First, the insert was not flat. I had to run it through my jointer several times to flatten it. So don't buy this insert unless you have access to a jointer.But, the major problem was the adjusting set screws were too short to bring the insert to the top surface of my jet saw. I ended up inserting normal pan headed screws from the bottom. This gave me enough adjustment room to get the insert level.So again, don't buy this insert unless you have access to an assortment of screws.