1、Hex Shank Design: Hex Shank Bits are used for installation of pneumatic screwdrivers, electric screwdrivers, pneumatic drills, hand screwdrivers and other hex tools. 2、Chrome Vanadium Steel Material: Made of high quality industrial grade heavy duty chrome vanadium steel, durable, high pressure resistant and can be used for a long time. 3、Great Accessories: For universal sockets, impact adapters and reducer sets, universal joint sets, socket adapters and drive reducer sets, drive impact socket extension rod sets, drive impact socket sets. 4、Rich Colors: Different color coding rings, clear help to quickly choose the right one. Easy to choose. Great Christmas gift for dad, father, husband, boyfriend, man, DIY handyman. 5、Multipurpose: Accessory set for auto mechanics, vehicle repairs, technicians, handymen and hobbyists at home, workshop factory or construction site.