I had to purchase a new 16" masonry drill bit for a project I am working on and it has the below grooves on the shank. I am curious why, but also want to know if there is a special drill that it is supposed to be used with, as I believe the grooves are causing the chuck in both a wired and battery drill I have not to center the bit in the chuck, which makes it very hard to put it in a position to not wobble all over the place!
What are the grooves on the shank of the 16″ masonry drill bits for
bitsdrill
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Best Answer
Yes, that shank is for an SDS-plus chuck. It won't work well in a regular three-jaw chuck.