8:39 These are called Rotary Rasp File Bits. They are used for de-burring, shaping and grooving. De-burring; as in after you have drilled a hole in metal use these bits to smooth over the edges of the hole and remove burrs.
WOW! A few of these I've seen, but most of them are entirely new to me! Thank you SO much for introducing such an incredible assortment of useful tools!
For the first one, to clean up the threaded bar, I used to just screw on a nut past where I was cutting then wind it flush up to the cut, quick file to take off the "stub of thread". Then when you take off the nut it deburrs it
1:40 You know what else can stop that from happening? The variable torque dial on the drill. Not hating on you Mr. Hacker, I've literally watched every video on your channel. Just hating on the product.
