Review on 🔩 TC900 Bosch 9-Piece Shank Drill Set by Eric Williamson

4" concrete screws. . There is a socket with a plunger that fits over the drill to drive screws so you don't run out of the drill need to take the drill chuck to attach a screwdriver and then remove the drill chuck and put the drill back in. Drill the next hole.It's a smart design, but if you're not installing more than 6-8 concrete screws at a time, it may be overkill "To spend $30 on this kit. The set also includes two sizes of Phillips screwdrivers in case your concrete screws have a Phillips head instead of a hex head, although in my experience most concrete screws have both. There are also optional adapters and bits to accommodate multiple configurations to allow. This is a beautiful set in a beautiful case. I haven't drilled enough holes to see how long the bits last, but I have a lot of Bosch tools and they are all high quality and I have no reason to doubt the bits' durability. Correct: From the factory, the wrong size Allen key was included in the kit. This means that the included wrench will not fit and will tighten the small screw that holds the drill bit in the adapter/chuck. I had to find a 3mm allen key in my tool bag to tighten the bolt and then it worked. But if I were in the field without my own 3mm allen key the whole set would be useless and I'd be furious! So I'm deducting a star for the packaging.