Twenty high speed steel drills perfect for drilling and modifying small Rochester Quadrajet carburetor orifices. Drill set includes sizes .013" thru .038" neatly stored in a metal case. (Drill sizes 61 thru 80)
Use of #4905 Pin Vise is highly recommended.
These drill bits will not reach the bottom of Quadrajet idle tubes, tubes must be pulled out of main body casting to be drilled.