Millner Tools Left-Handed Drill Bits
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What happens here
Garen from Millner Tools introduces a left-handed drill bit set. He explains that traditional right-handed drill bits tend to drive a broken bolt further in because their fluting is designed for drilling. Left-handed drill bits, when run in reverse, are designed to catch and back out the broken bolt, effectively extracting it. Millner's bits are fluted only for the first 3/4 inch to maintain strength (as fluting weakens the bit) and are available in both jobber and stubby lengths. The stubby bits are designed for impact drivers, utilizing the ratcheting action to help break loose stubborn bolts, while jobber bits are for regular drills.
Goal: Extract broken bolts and screws efficiently
Tools and materials
- Bolt Extractor Set — Alternative method for extracting broken bolts, especially after drilling a pilot hole
- Cordless Drill Hitachi — Using with jobber left-handed drill bits
- Impact Driver Milwaukee — Using with stubby left-handed drill bits for stubborn bolts
- Millner Tools Left-Handed Drill Bit Set — Drilling into and extracting broken bolts and screws
- Broken Bolt — Demonstrating bolt extraction
- Penetrating Oil — Loosening rusted or seized bolts
What they say
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What they say
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