|MFG Part #:||48-89-1034|
|Online Part #:||22251|
THUNDERBOLT® Black and bronze HSS drill bit. Thunderbolt design thicker web prevents bit breakage. Premium industrial grade steel provides heat resistance, durability and increases. Unique flute form improves chip ejection, reduces drill drawback and improves coolant flow to the drill point. 135° split point self-centers to reduce walking and penetrates immediately. Friction reducing finish increases drill, bit life. Highly recommended for use with portable drills.