View product detail page of BIT ROCK 1 X 20 WITH 7 / 8 X 3-1 / 4 SHANK. BIT ROCK 1 X 20 WITH 7 / 8 X 3-1 / 4 SHANK BIT ROCK 1 X 20 WITH 7 / 8 X 3-1 / 4 SHANK Code: 51121