3 stars, it lost 2 because: 1st star: bent (after heating with a flashlight), the bit was bent but the stuck brake bleeder was Not. 2nd Star: Square end looks like 13/64 I don't have a 13/64 square tool nut? Used to fasten and rotate 2 different vise grippers on the end before making a stuck heated bleed screw. Remove the broken bleed screw, the project failed.