Product name: Screw Extractors Standard: Imperial system Scope of application: Screw bolt removal Number of kits: 25 Extractor Sizes: 7/8 inch, 27/32 inch, 13/16 inch, 25/32 inch, 3/4 inch, 23/32 inch, 11/16 inch, 21/32 inch, 5/8 inch, 19/32 inch, 9/16 inch, 17/32 inch, 1/2 inch, 15/32 inch, 7/16 inch, 13/32 inch, 3/8 inch, 11/32 inch, 5/16 inch, 9/32 inch, 1/4 inch, 7/32 inch, 3/16 inch, 5/32 inch, 1/8 inch 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 Colour:black Material:Chrome-molybdenum steel Package Contents: 1 set * Screw Extractors Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.