Drillco Single 5/16, Spiral Flute 5/16" Shank Construction Reamer, Tough Reamer Built for Long Tool Life, Go-To Pick for Machinists and Toolmakers, Pro Grade Reamer for Accurate, Smooth Holes

Drillco Single 5/16, 5/16", Spiral Flute Reamer
✔️ Single spiral flute reamer, 5/16", Accurate Smooth Holes

This Drillco 5/16 is a reamer for sizing and finishing holes to tight, accurate tolerances. Machinists, toolmakers, mechanics and maintenance techs use it to finish drilled holes for dowels, pins, bearings and fits. This is a single piece listing.

✅ Brand: Drillco
✅ Mfr part number: 427A120
✅ Product type: Spiral Flute Reamer
✅ Pack size: Single, 1 piece
✅ Size or length: 5/16"

💡 Straight flute vs spiral flute reamers, what's the difference?

Flute shape changes how chips clear and how smooth the hole is.

• Straight flutes are the all around pick for most through holes.
• Spiral flutes cut smoother in holes with keyways or interrupted cuts.
• Left hand spirals push chips forward in through holes.

Pick up the Drillco 5/16 and keep your jobs moving.