Made of special High Speed Steel with 5% cobalt
Cobalt material provides better wear resistance in hardness and toughness
Suitable for high-tensile alloys, titanium, cast iron, high-nickel stainless steel
135º split point, self centers and keeps the drill from "skating" on hard meterial

Set includes:

[2] 1/16" 
[1] 5/64" 
[2] 3/32" 
[1] 7/64"
[2] 1/8" 
[1] 9/64"
[1] 5/32"
[1] 3/16"
[1] 7/32"
[1] 1/4"
[1] 5/16"
[1] 3/8"