The OTC Heavy Duty Drain Plug Pro is a quick drain oil plug that saves time and money by avoiding dropped or lost drained plugs.Having the right oil change tools for the job is key to good productivity. Product Features:Interchangeable designIncludes large attachments for large commercial vehicle drain plugs and 1/2 square drive differential plugsUse with any 3/8 square drive socket in your tool box.Safely remove Heavy Duty oil pan drain plugs avoiding contact with hot oil and prevent dropping drain plugs and other fasteners.The flexible shank with 3/8 square drive helps remove or thread smaller fasteners even in hard to reach placesContained on a handy socket rail for hanging or tool drawer storage.