This is an amazing invention that could potentially save someone the use of fingers or their entire hand. It is called Sawstop, and it prevents table saws from chopping through the digits of an unassuming user.
The high speed video of Time Warp shows how it works - stopping the saw blade spinning at 5,000 rpm in a millisecond doing no damage to a person's digits.
The creator of this device, put his own finger to the test with no ill effects:
While it costs $60 to replace the blade and Sawstop unit, it's a small price to pay for the safety feature.
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