8 point socket is also commonly referred to as double-square or railroad sockets Engineered specifically for use with impact tools..

Grey Pneumatic (2520S) 1/2" Drive x 5/8" Standard 8-Point Socket Features: Package Dimensions: 5.08 cms (L) x 5.08 cms (W) x 5.08 cms (H) Product Type: Wrench Package Quantity: 1 Country Of Origin: Taiwan _4 ounces _1.5 x 1.25 x 1.25 inches Categories:Tools & Home Improvement,Power & Hand Tools,Hand Tools,Wrenches,Socket Wrenches