What parts does a straight flute screw extractor consist of?
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Extractor head with straight grooves | ||
| The square extractor head with straight grooves allows it to be used in a drill. It must be a 4-jaw drill chuck, as a 3-jaw chuck is not suitable for a square shank. Tools such as a T-handle wrench, bar wrench, adjustable wrench or vise pliers can be connected to a square head. | |
 | Straight flute extractors are also available with a triangular head for use in three-jaw drill chucks. | |
Extractor shaft with straight grooves | ||
 | Straight fluted screw extractors also have a shaft, usually made of high carbon steel, that has been hardened and heat treated for increased strength to resist wear during extraction. | |
Extractor grooves with straight grooves | ||
 | A straight flute extractor has long, progressively tapering flutes so that it can be inserted into a pre-drilled hole in a damaged bolt, screw, or stud. It can loosen the left thread when turning clockwise and the right thread when turning counterclockwise. The grooves dig into the damaged object no matter which way you turn the extractor. | |
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