Similar to the Kupo Universal Single & Dual Set LED Tube Mount Holder in functionality, this LED Tube Holder features a 2.6in (66mm) rubber coated magnet that allows attachment onto steel surfaces with ease. Designed to support up to 4.4lbs (2kg), the Kupo Universal Single LED Tube Holder with Magnet features include two built-in spring metal clamps designed for quickly mounting those major brands of T-12 LED Lamp Tube Diameters from 38 to 42mm. Features rubber pads equipped inside the clamp that protects LED Tubes from scratches.