... 1/2, 6 1/27 7/8,8 1/2,8 3/410 5/8,12 1/413 3/4, 17 1/2,22, 24,26417 ... 1/2, 6 1/27 7/8,8 1/2,8 3/410 5/8,12 1/413 3/4, 17 1/2,22, 24,26115 ... BIT(3 blades,4 blades,5 blades,6 blades)5 1/2, 6 1/27 7/8,8 1/2,8 3/410 5/8,12 ... 1/413 3/4, 17 1/2,22, 24 ... you want more information,please feel free write to me. 8 3/8'' kingdream water well bit