* This Three flute countersink bit is manufactured from quality HSS-M2 * This offers durability and long service life * Comes with 1/2" shank Choosing the Right Countersink How to Choose The Right Size Countersink by Diameter A simple rule of thumb is to choose a countersink which is 50% larger than the diameter of the hole Countersink diameter = 1.5 x bolt size (hole) diameter Ex: For a 1/4-20 bolt, multiply the diameter (.250) x 1.5 = .375. This equates to a 3/8” countersink How to Choose The Right Size Countersink by Angle Angle is based on the screw or bolt type being used 82º is most common

* These three flute countersink Bit are manufactured by Hartingen * Special spiral flute 90 degree geometry with unequil helix angles * High grade HSSCo substrates hold up well in high-tempreture applications * Low vibration without chatter marks * The tianin coating ensures higher wear resistance * Reduction in axial force by 50% * Reduction in radial force by 25% * German technology at a fraction of the cost

* These three flute countersink Bit are manufactured by Hartingen * Special spiral flute 90 degree geometry with unequil helix angles * High grade HSSCo substrates hold up well in high-tempreture applications * Low vibration without chatter marks * The tianin coating ensures higher wear resistance * Reduction in axial force by 50% * Reduction in radial force by 25% * German technology at a fraction of the cost