I assembled a game table and 4 chairs for my granddaughter and after doing a sketch of the chair to visualize how all the pieces fit I noticed that the 6- Inch-square #2 screwdriver that came with the K5 pocket hole gauge did not fit in a few places after the screwdriver was inserted into the drive. So I ordered a 3" and 6" Kreg set and everything worked out beautifully. The 3-inch screwdriver makes it easy to get the drill into those hard-to-reach places.