The Sealey AK752 Screw Extractor Set is supplied in a storage case The Sealey AK752 is a 5 Piece Screw Extractor Set that is designed to ensure the removal of even the toughest bolts/screws. Featuring 8 points of contact to make non-slip engagement with the bolt/screw. Features: Supplied in storage case Four double edged cutting/gripping sides Ensures removal of even the toughest bolts/screws 8 Points of contact to make non-slip engagement with the bolt/screw Comes With: #2: 4.8-7.1mm(5/16-3/8\") #1: 3.2-4.2mm(3/16\"-1/4\") #3: 6.4-9.5mm(7/16\"-1/2\") #5: 11.1-15.9mm(5/8\"-3/4\")  #4: 8.7-12.7mm(1/2\"-9/16\") Specification:  Model No: AK752