I have an old Harbor Freight 14.5 inch mill/hand lathe. Additional tool holders are available at a great price so you can have one for each bit and line them up perfectly. Very well made and the bits are finely ground. I used a simple steel ruler to level and it worked great. I made a cut on some small diameter brass rods. I will also use them on aluminum and steel. A bit of thread is included in the kit and I don't need it. I suggest including a boring bar for us manual lathe owners (more useful in my case). I highly recommend this product and the seller!