Am I able to use these spark plugs?

My parents were going to get me new spark plugs for my car while they were out and about, but they forgot the old ones for comparison. The ones I got were the wrong size and too short, these ones are the exact same dimensions as the old ones, expect on the new ones, the threads only go half way down, and even my... show more My parents were going to get me new spark plugs for my car while they were out and about, but they forgot the old ones for comparison. The ones I got were the wrong size and too short, these ones are the exact same dimensions as the old ones, expect on the new ones, the threads only go half way down, and even my mechanic brother doesn't know if it will work, anyone here know?
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