Irwin 10225 4-Piece Unibit Set #1, 2, 4, 21

Unibit Step Drill Set 10225 Features:
•  Single-flute cutting edge for greater control through steps
•  3 flatted shank prevents slipping in drill chuck
•  Non-skid self-starting tip eliminates skidding and the need for center punching

10225 4-Piece Set Includes:
HSS #1, 2, 4 and 21 sizes