Boneham - Type H, No. 22 Inside Diam, Head, Press Fit Drill Bushing Facility Safety WD1 is a proprietary coating

WD1 is a proprietary coating exclusive to OSG Tap and Die

2559 Drill Bit Material Solid Carbide Drill Point Angle (Degrees) 135 Coating/Finish ZrN Flute Type Regular Spiral Cutting Direction Right Hand Point Type Standard Coolant Through Yes Number of Flutes 3 Shank Diameter (Decimal Inch) 0

They are constructed of six sides and fit into a quick change chuck

Dust-Tight

Material: Cermet

Boneham - Type H, No. 22 Inside Diam, Head, Press Fit Drill Bushing Facility Safety WD1 is a proprietary coatingItem #: 07622459 Brand: Boneham Model #: H2012EV Features and Benefits Head Press Fit Product Specifications Bushing Industry Code H Inside Diameter (Wire) #22 Inside Diameter (Decimal Inch) 0. 1570 Body Outside Diameter (Inch) 5 16 Length Under Head (Inch) 3 4 Renewable Bushing No Installation Method Press Fit Head or Headless Head Head Outside Diameter (Inch) 27 64 Head Height (Inch) 1 8 Bushing Material Steel Counterbored No Inside Diameter