5-Piece Bolt Extractor Set Includes heavy-duty extractors for: 1/4", 5/16", 3/8", 7/16", and 1/2" bolts

✦ Removes bolts without wedging or binding.
✦ Works on right and left threaded bolts
✦ Heat treated high strength steel
✦ Instructions:
　1.Use largest extractor possible.
　2.Drill exact center of bolt at least 3/8 inch deep with correct size drill as shown below.
　3.Using a hammer,firmly tap the extractor into the hole 1/2 to 3/4 the length of knurled
　　extractor tip.
　4.Use wrench on extractor to remove bolt.