Personalized Mechanic Nuts and Bolts Youth Long Sleeve T-Shirt. Mechanic Nuts and Bolts Youth Long Sleeve T-Shirt - Red, underlined with a wrench and bedecked in nuts and bolts, are a unique gift design for professional and weekend mechanics! youth long sleeve t-shirt. Shoulder-to-shoulder taping. Youth: S(6/8), M(10/12), L(14/16), XL(18/20)