Review on 🔧 Enhancing Efficiency with Z Threaded Hex Flanged Internal Threads by Aaron Parish

I've had no trouble installing into seasoned red oak (hardwood). Hardwood Solution: Take your time at first and don't use a percussion tool. Drill a hole of the desired size and depth. Second, use a screw short enough not to reach the bottom of the insert and a washer between the screw and the insert. Third, use a socket wrench and socket to screw the insert into the wood, take your time, don't use an impact wrench or drill, only hand tools. Fourth, remove the short screw, sometimes you need to hit the screw or socket wrench handle with a hammer to remove the temporary screw. Fifth, place any length screw you need to connect the two pieces of material. Just take your time and only use hand tools on the inserts. I know other reviewers have indicated they had issues with these hardwood inserts. I installed 12 of them without breaking, removing or damaging using this method.