Review on Polish-Friendly Flexi-Attachment Extension for Enhanced Compatibility by Brad Blake

This is excellent value for money. However, common sense must be used when constructing this drive cable. I installed it on my HF Dremel Style Tool and it works very well. There is a lot of friction, so you need to lubricate the drive cable. If you just use something like a 30 viscosity oil, you'll find that it ends up dripping. And you have to constantly wipe the accumulated oil from the broken end of the cable. Therefore, use a slightly thicker lubricant. I have used white molybdenum grease and am very happy with the results. Perhaps you could use a heavier lube since the heat generated will dilute it and move it through the tube. It was a good investment for long-term use in a limited space. Porting the cylinder head in my case.