Irwin Unibit 15104 Step Drill Bit, 3/16 to 7/8 in Dia, 3 in OAL, Tree Flute, 1-Flute, 3/8 in Dia Shank, Round Shank Eye Protection the F-18XP delivers the ultimate

the F-18XP delivers the ultimate in jobsite efficiency

with and without ZrN coating

It has a large die-cast aluminum footplate

The optimized SHOCK ZONE™ absorbs peak torque and prevents bit breakage

Irwin Unibit 15104 Step Drill Bit, 3/16 to 7/8 in Dia, 3 in OAL, Tree Flute, 1-Flute, 3/8 in Dia Shank, Round Shank Eye Protection the F-18XP delivers the ultimateSelf starting bit features single flute cutting edge for greater control through steps. Three flatted shanks prevent slipping in drill chuck. SpeedPoint tip penetrates faster and prevents walking in applications such as drilling holes into stainless steel, copper, brass, aluminum, plastic, laminates and other thin materials up to 1 8 in thick.