1" 100° HSS 6-Flute Chatterless Countersink 60° 6-Flute Countersinks It has a 135° split

It has a 135° split point tip for fast and accurate drilling and is manufactured to Aerospace Standard 907 for superior quality

can be used to enlarge existing holes

as well as a 1/2" reduced shank that can be used in a wide range of tool-holding systems

as well as a 3/4" reduced shank that can be used in a wide range of tool-holding systems

1" 100° HSS 6-Flute Chatterless Countersink 60° 6-Flute Countersinks It has a 135° splitSpecifications SIZE 1" OVERALL LENGTH 2 3 4" MATERIAL HIGH SPEED STEEL FINISH UNCOATED (BRIGHT) SHANK DIAMETER 1 2" NUMBER OF FLUTES 6 SHANK TYPE ROUND CUTTING ANGLE 100 SUGGESTED PACK QTY 1 6 flute countersinks, also known as chatterless countersinks, are designed to remove more metal compared to countersinks with fewer flutes. They are also more effective on harder materials and provide a more chatter free cut.