worst drills. I have worked as a mechanic and locksmith and have a full workshop at home with lathes, welders and milling machines. I needed a cheap set while on vacation so I figured this would help. NO. The 1/8th bit broke as soon as I touched the workpiece, before I even started applying pressure to it. The other two I tried blunted to an unusable state after less than 1/4 inch of metal went through. In the photo they show steel. This is clearly rubbish, do not buy for any purpose.