Power banks with width range from 53mm to 81mm, which covers most power bank products in the market like Anker, RAVPower, POWERADD, etc. It comes with two 1/4 screws, which can be used to attach the holder to the desired place, and the screw tighten design ensures a more secure and stable clamping of the power bank. Inbuilt rubber pads help absorb shocks and prevent your power bank from scratching. It weighs 80g only.