Plastic coating on outside of socket wall to prevent damage to rims. Plastic cap on inside of socket to protect lug nut for damage. Different color socket for each size for easy determination. Plastic case with built in handle. 11 of the most popular sockets used on passenger cars Sizes included: 3/4", 13/16", 7/8", 15/16", 1", 1-1/16", 17mm, 19mm, 21mm, 22mm, 23mm