I ordered this because my original Pocket hole setup only had one size hole . This meant that I could only Use it on half inch wood, leaving out capability of using smaller thickness wood. This has a smaller bit which works extremely well when you get the clamping of the block down. as a matter o fact This was the only set back, it takes a bit to figure out the best spot and way to get it clamped to you working pice, keeping it from wobbling around.I hope this helps you in making your decision easier...