Review on Improved BikeMaster Spark Plug Guard by Fuzzhead Nelson

I've tried bike and snowmobile spark plugs in it. They have a diameter of 14 mm, long threads and an electrode base. So I can't use them for anything other than my chainsaw and lawnmower forks. OH I DON'T NEED THIS FOR MY CHAINSAWS AND LAWNMOWERS. THEY ARE NEEDED FOR MY MOTORCYCLE, SNOWMOBILE AND ATV. So in this case they are totally useless for the purpose I bought them for. Try elsewhere, they won't work for anything that has long thread spark plugs.