Set of 7 Countersink Drill bit Set, 3in1Woodworking Countersink Counterbore Drill Bits
Specifications:
For Drilling #4 #6 #8 #10 #12 Screws Holes
With Adjustable Depth Stop,
1/4” Quick Release Hex Shank,
Sizes: 5/64”, 3/32”, 7/64”, 1/8”, 9/64”
Include：2-Allen Wrench
Functions：
To have the head of the screw below thesurface then conceal it with matching wood plugs
To have the head of the screw fit flushwith the surface
Compatibilities:
The high quality M2 pilot drill bits areprecisely ground. It is detachable. You can move it up and down in thecountersink/counterbore sleeve to adjust drill depth to meet multi screwlengths.
The cutting angle of the 3 countersinkchamfer cutters is 82 degrees, perfect for popular screw heads.
The counterbore is 3/8” in diameter, 1/2”in full depth. They will meet your needs from flush countersinking to a full1/2" of counterbore for dowel buttons or plugs.
Reference Chart：
Size 5/64 (2mm) for #4 Screw
Size 3/32 (2.5mm) for #6 Screw
Size 7/64 (2.8mm) for #8 Screw
Size 1/8 (3.2mm) for #10 Screw
Size 1/8 (3.2mm) for #10 Screw
Size 9/64 (3.5mm) for #12 Screw
Size 9/64 (3.5mm) for #12 Screw
For softwood, we recommend you to use adrill one size smaller than the screw calls for.