Nils USA Hand Augers feature unique chromium steel cutting head design allowing fast and balanced drilling, no bolts to interfere. A one piece cutting head instead of individual blades! This design offers a stronger over all cutting surface. The cutting head is constructed of high chromium steel, which is more durable than other brands of auger blades and will stay sharper much longer. The curved blades quickly cut through the thickest ice with little to no downward pressure applied. These augers do all the work. All models come with a plastic cutting head cover to protect the blades from damage and to protect users from the blades.