Personalized Nuts, Bolts, Angles and Gray Steel Beams Tote Bag. A pattern of steel I-beams, channels, angles and nuts and bolts is a unique gift design for construction workers, structural and civil engineers and steel detailers and drafters at birthdays, holidays and graduation. Light Weight 6oz 100% Cotton Tote Bag. 14.5"W x 15.5"H, handles are 20" in length.