My favorite tool isn't a mechanic's tool but I've used it several times. It's a draw knife, about a foot long, with two round handles. It's pretty special to me because my grandfather who was a blacksmith, wheelwright and carriage builder made it in his blacksmith shop from a worn out horse-shoer's rasp. He used the drawknife to shape long pieces of white oak, to be used for wagon tongues and other tasks that required removing a lot of wood quickly. Even though I've only used it a few times, it's a pleasure to use since it is so well balanced in the hands, compared to machine made drawknives. It sits, always sharp, ready for another job. Best regards, jacques