NAPA recently expanded its NPT Professional Air Tool Program to include the new 849 Impact Sockets. Made of chrome molybdenum alloy steel for added strength and durability, the sockets are available in 1/4", 3/8", 1/2", 3/4" and 1" sizes, with designs that include deep, standard, internal and external stars, deep universal, hex and flip. The sockets also come with a lifetime warranty.