I had a screw embedded in my SUV tire. After removing the screw, I reamed the whole with the included reamer. Then, I threaded the 'needle', rubbed the needle in the lube, and pushed the plug into place. The needle in this kit has a flange on the shaft that's supposed to be pushed against the plug/tire before pulling it out. I'm not sure how useful this is but, I followed the directions and things went well. Overall, a good kit with enough plugs to last a very long time.