Proto J49004CF Crowfoot Socket Set: Alloy Steel, Chrome, 9 Tools, 3 8 in Drive Size 324D25614K 3189 Flute Type Spiral Material 3189 Flute Type Spiral Material High Speed Steel Finish Bright (Uncoated) Coolant Fed Non Coolant Through Cutting Direction Right Hand Number of Flutes 2 List Number 150D Coolant Through No Point type Conventional Application For Non Ferrous Materials Grade General Purpose Standards DIN 338 Helix Angle 21 Degrees to 34 Degrees Primary Material Application Aluminum (1) 15 32 in Thunderbolt(R) Titanium Coated Drill Bit (48 89 2227) Measurement Type SAE Finish Full Polish SAE or Metric SAE Number of Pieces 9 Head Style Open End Accessories (1) Socket Rail 13 in featuring durable alloy steel and a sleek chrome finish