Bit fits powerheads for Item#s 191162, 191163, 191158 and 24778. Hardened blade. Includes exclusive Shock Absorber Spring to protect you and gear train from impact of hitting rocks and other obstructions. U.S.A. Auger Bit Diameter in. 6, Digging Depth in. 36, Auger Bit Length in. 32, Product Type Earth auger bit.