Drill America DWDDL Series High-Speed Steel drill bit is for general purpose drilling in applications where extra length for reach is required. It is designed to perform in a broad range of materials in the iron and steel families. Ranging from 8" to 24" long, Drill America DWDDL Extra Long Drill Bits are for applications where extra length is required for reach. Standard 118 degree conventional point tip for designed to perform in a broad range of materials in the iron and steel families. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.