Surprisingly strong construction. The metal part is VERY solid (seriously, I was able to use this to loosen a giant flathead screw when I couldn't find my giant flathead screwdriver) and the block of wood is solid, as is the handle. The block slides easily when unlocked. , and snaps securely into place when snapped into place. The angles are correct and do not change. Overall, it's perfect for painting and woodworking. And giant pan head screws I guess.