Easy to install and remove in 5 seconds. No tools required and no drilling needed. Note: For balance only. Not intended to support weight. Simply choose a smooth area, clean the surface, attach the grab bars, press firmly into place and lock by the switches at each end. Suction cups with flip-up locking tabs Provides assistance & added safety Made of thick engineering plastic material, sturdy and durable. Double suction cups and non-slip design provide firm grip and safety. Sewing Tools Ruler Handle (Strong Adsorption) is to solve the problem that the ruler cannot be picked up normally on the desktop, it can be easily solved with it, making the operation easier. Package Dimensions ‏ : ‎ 12 x 4 x 3.2 inches; 1.76 ounces