The Countersink set is the ideal tool for chamfering deep and hard to reach holes.

Comes with handle, C-holder and C-20 Countersink blade.
Additional Blades available.

C-Holder and Countersink Blades 

All NOGA blades are made of high speed steel hardened to 64Rc

C-Holder

Has external M-7 thread to accept all 3 "c" countersinks

C-12 1/2" Countersink

C-20 3/4" Countersink

C-30 1-3/4" Countersink

Very fine for deburring the front and backside of holes
Blade has two pairs of cutting edges
Cuts both blockwise and counter-clockwise
Blade has two working positions

R3 -Reversible Countersink 

Range: 26/64" - 27/32"

R3 -Reversible Countersink 

Range: 13/64" - 11/32"

R1 -Reversible Countersink 

Range: 1/8" - 7/32"