1978 - Volume #2, Issue #4, Page #16
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Left Hand Drill Bits
Unlike conventional right hand drill bits, the left hand spiral turns in the same direction the broken stud has to be turned. And, unlike the usual "drill tap" method, the left hand bit will usually save the screw. In most cases, turning of the drill will turn out the broken stud without seriously damaging it or the threads.
Although the left hand bit, made of high quality steel, can be used for regular hole drilling, you probably wouldn't use it except in emergency situations since it's more expensive.
For more details, contact: FARM SHOW Followup, Lawson Products Company, 1666 East Trough, Des Plaines, Ill. 60018 (ph 316-672-3915).
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