Making some simple throwing spikes also known as Bo Shuriken. They are made from 1/4 inch masonry bits.
The tails of these bits are quite hard as they are designed to be hit by the drill so they will make good points. I opted for 6 mm bits so that the head is heavier, making them more stable in flight. They were also very cheap, paid under a buck each.
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WARNING: These are not toys and are very dangerous! This video is for entertainment purpose only, don't do anything you see me do.
