Kwik StepperĀ® Greenlee Step#14 Bit. Features: - Unique split-tip design penetrates through steel faster - Resists walking or skidding, even on round surfaces - Balanced, double-flute construction requires less pressure, does the work for you - Designed and manufactured in USA. - Capacity : Cut Up Through 3/8 IN (9.500 MM) Mild Steel, Copper, Brass, Aluminum, Wood, Plastic and Laminates - Hole Size : 7/8 IN (22.200 MM), 1-1/8 IN (28.600 MM), 1.201 IN (32.500 MM), 1-7/32 IN (31.000 MM), 1-1/4 IN (31.800 MM), 1-3/8 IN (34.900 MM) - Maximum Material Thickness : 10 GA (3.500 MM) - Minimum Chuck Size : 3/8 IN (9.500 MM)