The grip/fastening for the table works great and after over 6 months of use does not give way. The arm is in metal and also feel sturdy. Unsure if the 'joints'/hinges can be tightened as they are the only that may feel a tad 'flimsy' But so far it doesn't feel like it's going to break, more like it'll come loose. A good product that help me rest my arm more comfortably as I work. Definitely something I would recommend