12 PRO PRECISION GROUND HOLLOW PUNCH SET 3MM - 19MM ROUND CIRCLE HOLE CUTTER
Precision Ground Flutes And Cutting Edges. Knurled Bodies For A Secure Grip. Heat Treated High Carbon Steel. Ideal For Making Clean Accurate Holes In Set Includes Sizes 8mm (5/16"). 7mm (1/4"). 6mm (7/32").