18-Piece Bolt Extractor Kit, 3/8″ Drive Impact & Nut 18-Piece, 18 Piece

The internal thread with reverse spiral flutes is designed to bite down for maximum gripping power. 18 pieces nut extractor socket set includes 3/4″(19mm), 11/16″, 17mm, 5/8″(16mm), 9/16″, 14mm, 13mm, 1/2″, 12mm, 7/16″(11mm), 10mm, 3/8″, 9mm, 5/16″(8mm), 7mm, 1/4″, socket adapter and knockout pin.