SDBN - HSS Slot Drill, Ball Nosed Threaded Shank. SDFC3 - HSS 3 Flute Slot Drill. EMC- Carbide End Mill. ... EMCSG4 - Carbide Slug End Mill, 4 Flute, Right Hand Helix. EMCSGLH4 - Carbide Slug End Mill, 4 Flute, Left Hand Helix. EMCSGSF3 - Carbide Slug End Mill, 3 Straight Flutes.