Sherwood: 16MM HSS-Cobalt 3FL Sc/Sh Slot Drill Regular Series Type 5321T. Bright finish. Flute type: 30 helix. Manufactured to BS 122: Part 4: 1980. Metric Tolerances: Diameter: up to 38.00mm. Tolerance: +0.0630, -0.0130. Diameter: Over 38.…View more