These dual-pin holed at drive end with retention ring grooved impact sockets are built for professionals to gain extra access at tight spaces around the nuts and bolts. The thin wall design is secured with carefully heat tempered Chrome Molybdenum Steel; this offers great strength to meet ANSI standards and beyond. The black phosphate finish offers outstanding corrosion resistance while giving non-slipping surface texture. All 11 sockets are size-orderly placed on a strip of chrome finished premium rack for easy size selection and effortless storage.