Amana 55208XL High Performance Carbide Tipped AlTiN Coated 82 Degree Countersink #8 Screw 7/16 Dia x 11/64 Drill Dia x 5/16 Round Shank

Used to countersink holes for the heads of screws in woods and plastic. The 2-flute integral design ensures uniform and concentric results each and every time. High performance carbide tips with Aluminum Titanium Nitride (AlTiN) coating provide chip free hole edges and lasts longer than uncoated carbide tipped and much longer than steel countersinks.
Available in a wide variety of sizes, complete with the HSS M2 fully ground drill bit.
Excellent for Drilling:

Natural Woods
Man-Made Boards
MDF
Chipboard
Plywood
Composites
Composite Decking Materials



AlTiN coating has many benefits:
 

Extra wear resistance
Allows for faster feed and speed rates
Cutting edge protected from wear
Better chip evacuation
Less heat build up
Superior cutting quality and extended tool life