Personalized Mechanic Nuts and Bolts Women's V-Neck T-Shirt. Mechanic Nuts and Bolts Women's V-Neck T-Shirt - Kelly Green, underlined with a wrench and bedecked in nuts and bolts, are a unique gift design for professional and weekend mechanics! 5.0 oz., 100% pre-shrunk cotton Athletic Heather is 90/10 cotton/polyester 1x1 rib collar with mitered v-neck Shoulder-to-shoulder taping Ladies' fit