How do they Punch Hex Slots in cap screws?

MASSIVE BIG WIN! WOW! NEW HEX BREAKER 3 SLOT Slot hex slot Draper - 64341 - Draper 64341 3mm 14 Hex Plain Slot Insert Bit 100mm Long x 1 hex breaker slot slot and the hexagon in the hex slot It takes a mighty effort to make it out of one of those slots That's why you find so many of the more driven types

hexbreaker slot machine slot , shaped long and tapered somewhat as shown in the accompanying drawing Hex steel · 10 Steel blade EIN CHISEL HELD IN AIR HAMMER FOR