Internal Combustion Auto Engine Piston Car Pendant Alloy Keychain Key Ring Every man knows that it's his piston and con rod that must be made with precision and intergrity if he stands a chance of finishing in first place. If you're looking for something unique and personalized for him, capture the essence of your man's craft or hobby with a favorite hardware tool fashioned key chain design item. Miniature replicas of classic shaped tools make great, if a bit unusual, gift items for birthday or Valentine's Day celebrations. Material: Alloy