Drill America 1/4'' X 3/32'' High Speed Steel Aircraft Counterbore 1/4'' Shank, Dew Series

Drill America Qualtech Decor Series Aircraft Counter Bore Counter Boring Is The Enlargement Of A Portion Of A Hole That Has Previously Been Formed If The Counter Bored Portion Is Shallow (1Inches Or Less), The Operation Is Usually Known As Spot-Facing For Example, A Flat Seat For A Bolt Head Or Nut If, On The Other Hand, The Hole Is Enlarged To A Considerable Depth, It Is Designated As Counter Boring This Counter Bore Is Made Of Two-Piece Construction, Having An Integral Shank And Counter Bore-Cutter, And A Pilot That Is Interchangeable, Which Provides Flexibility In The Use Of The Tool High-Speed Steel Tools Are Good For Most General Purpose Applications, Offering A Combination Of Hardness And Toughness For Wear Resistance Round Shanks Allow Use With A Wide Variety Of Tool Holding Systems