Input Drive: 1" FemaleOutput Drive: 3/4" MaleMaterial: Black Oxide Heat-Treated Alloy SteelImpact RatedDesigned To Use With Power Tools, Such As An Impact Driver Or Impact WrenchConverts 1" Drive Ratchet Or Breaker Bar To A 3/4" DriveOnce Attached, The Unit Will Now Accept Any 3/4" Drive SocketDesigned To Use With Impact Sockets, But Can Be Used With Traditional (Non-Impact) Sockets With A 3/4" DriveLaser Etched Markings For Easy IdentificationDual-Hole Design And Ring Groove Allow For Easy Adapter Attachment And Removal