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How to remove rounded Allen head bolts - the complete guide

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In this video I demonstrate some of the techniques that we use regularly on site to remove rounded Allen head bolts, or hex key head bolts. Allen head bolts can be difficult to remove as dirt can get compressed into the head which means the minute you insert the Allen key and apply pressure it rounds off the bolt.
The techniques used in this video are-
1. Mole grip or vice grip pliers
2. Cold chisel and hammer
3. Weld a nut onto the rounded bolt
4. Drill using a left-handed drill bit
5. Drill the head from the bolt
6. Screw extractor
7. Trend Grab-It pro
8. Centre punch

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