I had been wanting to get my log burner flu cleaned for a while, figured it couldn’t be that hard to do it myself. So took a punt on the Vevor kit. It arrived promptly, locking mechanism on the rods seems secure, rods were flexible enough to go through my stove door and round the angles in the chimney, I had no issues using it. Wondered whether my cheap battery drill would rotate it OK, but it did with no problems. Wondered if the brush would be effective, certainly seemed to be, plenty of soot was brought down into the stove. Very happy with the purchase, see no reason I can’t be using it to clean my flu for the next twenty years.