Drill Bit - IRWIN High Speed Steel Fractional Step Drill Bit - 1/8"-1/2", 10231 Blended Specialty Chemicals Noise Reduction Rating (NRR)*: 26

Noise Reduction Rating (NRR)*: 26 dB

an ultra-sharp edge and virtually unbreakable design to maximize your performance

With its automatic OFF functionality

This MILWAUKEE® hard hat includes an adjustable swinging ratchet for better comfort and has a 6-point ratcheting suspension for quick adjustment

Rust-resistant black oxide finish

Drill Bit - IRWIN High Speed Steel Fractional Step Drill Bit - 1/8"-1/2", 10231 Blended Specialty Chemicals Noise Reduction Rating (NRR)*: 26Item #: 10231 The IRWIN UNIBIT HSS Fractional Self Starting Step Drill Bit is made of high speed steel. Hole sizes are permanently laser etched on the inside of the flute and will not wear away for easy identification throughout the life of the bit. The bit features a quick change hex shank that secures easily in the drill chuck. New SpeedPoint tip penetrates faster than previous Unibits and prevents walking Ideal for drilling holes into thin