Personalized Mechanic Skull Youth T-Shirt. Mechanic skull! An angry skull with an open end wrench and socket wrench instead of crossbones, and metal wings behind it all. Cool gift for your favorite mechanic! Let the good times roll in a durable T-Shirt that takes kids from school to play in an amazing array of colors. 5.0 oz., pre-shrunk 100% cotton. Seamless 1x1 rib collar.