Material: Chromium Molybdenum Steel Color: Black Extractor Sizes: 7/8", 27/32", 13/16", 25/32", 3/4", 23/32", 11/16", 21/32", 5/8", 19/32", 9/16", 17/32", 1/2", 15/32",7/16", 13/32", 3/8", 11/32", 5/16", 9/32", 1/4", 7/32", 3/16", 5/32", 1/8" Case Size: 19 x 15 x 4.5cm/7.5” x 5.9” x 1.8” Total Weight: 1.75kg/3.85lbs Package Includes: 25 x Screw Extractors How to Use Screw Extractors: 1.Create a hole in damaged screw with a drill bit 2.Push the extractor through the hole 3.Twist the extractor until the flutes bite 4.Turn the extractor counterclockwise with a wrench or drill to remove the screw