Irwin Unibit 15103ZR Step Drill Bit, 1/4 to 3/ Dia,
✅ Battery Charges via USB-C Port
✅ Battery Indicator Shows Charge Level
🛍️ Try Drilling Performance Free
Self-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, penny, brass, aluminum, plastic, laminates and other slim materials up to 1/8 in thick.





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