DRILLCO Series 500A 116 is a size 1/4 heavy duty, fractional drill bit in cobalt with a straight shank, an overall length of 4 inches and a flute length of 2-3/4 inches.
- Heavy duty construction made to Type J aircraft specifications.
- Used for drilling holes in hard tough materials such as stainless steel titanium high temperature and high strength alloys.
- High red hardness of cobalt permits speeds 30% greater than HSS drills.
12 bits per pack