Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Can't push on it

I bought this based on the great reviews that I saw on Amazon. I've had it for several months now. It is sturdy and powerful, but what I don't like about it is that when you have it in it's normal, straight position and push hard on the end of it to put pressure on the the screw that you are trying to put in or take out, the screw driver collapses into it's bent, L shaped orientation. There is no way to lock it into a straight orientation. Frustrating. Also it didn't come with a normal screw attachment, only one for Philips screws. What's up with that?