Review on Bosch PCM12 Quick Change Mandrel by John Jones

This is a great tool. It wasn't immediately clear to me, but "1/2 inch" refers to the size of the hex shaft. , has nothing to do with the hole saw connection. 1/2" and 3/8" shanks fit the same hole saw adapters. Kit http://www.amazon.com/Bosch-HB25M-Bi-metal-25-Piece-Master/dp/B000WA4XCY. Unfortunately, he doesn't really fit into the picture.