The Grainger 170H29 is a 3M Speedglas Welding Helmet that features auto-darkening technology to protect the eyes and face during welding, cutting and grinding. It has a large viewing area, multiple adjustable settings like shade control and sensitivity, and comfortable padded headgear. The helmet provides shade levels from 5 to 13 for optimal eye protection. It meets industry safety standards and has a battery life of up to 3000 hours. The Speedglas 170H29 is ideal for professional welders who need an adjustable, high-quality auto-darkening helmet.