Irwin Industrial Tools 10225 Unibit General Purpose Step Drill Bit Set, 4-Piece
Irwin's Unibit SpeedPoint combines the most desired features of a Step Drill, speed and control and as many as 13 different sizes onto one single-fluted step drill bit. Irwin Industrial Tools 10225 2254-Piece General Purpose Set (10231, 10232, 10234, 10221)