1/2", Internal Pipe Wrench, Nipple Extractor, Eliminates The Possibility Of Damage To Threads, Walls & External Nickel Or Chrome Finish, Exclusive Cam Action Provides Non-slipping Grip On The Inside Of Nipples, Pipes & Fittings & Can Be Turned Either Way, Made Of Zinc Coated, Heat Treated Alloy Steel, Carded.