"Bit fits powerheads for Item#s 1191162, 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. Digging Depth in. 36, Product Type Earth auger bit, Auger Bit Length in. 33, Auger Bit Diameter in. 8, Shaft Diameter in. 7/8. Bolt Hole 3/8in."