Milwaukee 48-89-1120, 20 piece Thunderbolt(r) drill bit set is designed for use with cordless and other portable drills
The bits are engineered with a thicker web and unique flute form which allows for quicker penetration and improved drilling times
With increased strength built into the web, the Thunderbolt(r) bit can perform many operations where conventional bits break
The open flute form ejects chips more efficiently when drilling deep holes which helps prevent lock-ups at breakthrough
Black and bronze high speed steel provides heat resistance, durability and increases bit life
135 degree split point design starts fast and reduces walking
