KMSS17001 Watch Screwdriver Smooth Ball Bearing Head TM

I had to return the watch screwdriver because it was delivered without the screw to hold the screwdriver portion in place. I have a large selection of small screws made for watch repair but I couldn't find one that fit in the threads on the side of the device. Also, I found that the back of the device often came off as well as the section holding the Phillips and straight blade sections. So I had to return it as these things should not happen to devices that cost around $20. I suppose if I had found the right screw, I would have kept it but since I tried almost every small screw that I owned and couldn't get a solid connection, I felt that it's well-made but still needs improvement.