Manufactured using quality chrome molybdenum alloy steel Sockets feature outer protective sleeves and inner plastic inserts to prevent damage to custom wheels and decorative lug nuts 1/2" drive Hollow design for use on longer wheel studs Color-coded for easy identification Set Includes: ATD-4358 - 17mm (Blue) ATD-4359 - 19mm (Yellow) ATD-4360 - 21mm (Red) ATD-4361 - 13/16" (Purple) ATD-4362 - 7/8" (Green) ATD-4363 - 1" (Bronze) ATD-4364 - 1-1/16" (Black) Molded storage case