Aries Outlets 2.5X420mm Dental Loupes Binocular Magnifier Medical Surgical Glasses Frame (Black)

I bought these to get me by for the time being. My first pair was great for the price. Lasted a good amount of time. I bought another pair and within a week they broke on the top of the frame. I bought a second pair and they broke in the exact same spot. There are better options out there

I think the quality for the buttom changing the interpupillary distance is very low, very coarse not fine. I dont know this is with all or it is just my loup.Thank you