Have I bought this set because it has taken root a Miesse screw in my tire tread. Screw raus hole instruction according to the file increases - Vulkanisierstreifen inserted - rotated 90 ° to right and rausgeogen. Must I have verhunst the first strip as I have a couple of laps in the circle turned instead to make a 90 ° turn to confess. The second strip was afor any problems. refilling anach the tires with Lut and wait 5 minutes. Then cut the strips and pour over it with a little bit of water look if you can see bubbles. No bubbles tire sealant. Now the tire in winter NOC must show whether he will remain tight. Do not be put off by Bewerteungen where is written the tool is bad. Can not confirm that and know myself very well with tools made. Usually it is also usually stop at the serving the tool. Hope's contribution helps you further.