The Hobart Inventor™ Series (770890) is a fundamental helmet with adjustable head gear, expanded 9.3 square inch viewing area with a #3, #9-#10 shade range, grind mode and analog controls. Grind mode prevents the lens from darkening for clear, visible grinding. The analog controls allow the user to easily adjust shade, sensitivity and delay. The helmet has four independent arc sensors that provide dependable arc detections.