It is total hand free to change shade. The item "3/9 &$$New pro 4-1/4 x 2 Auto Darkening Welding Lens Filter Shade Fixed 9" is in sale since Saturday, January 21, 2017.
This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Welding & Soldering Equipment\Welding Equipment & Accessories\Welding Protective Gear\Welding Helmets". The seller is "chainaa" and is located in Rowland Heights, California. This item can be shipped to United States.