Attention: Whoever wrote the technical data for this article is completely wrong. First, says the thing weighs 1.32 pounds. The item weighs approximately 5 ounces. Second, the length is 4.5 inches. The actual length is less than 3 inches, which is enough to install a spark plug. If you have a deep-seated plug and don't have a ratchet extension, you're screwed. The item itself is rated 5 stars as stated by other reviewers.