OGT1572 Features: * Unique split tip design penetrates through steel faster * Resists walking or skidding, even on round surfaces * Multi-hole step bit * Bit/Blade Mounting Type: Chuck * Applicable Materials: Mild Steel, Copper, Brass, Aluminum, Wood, Plastic, Laminates * Shank Diam: 3/8 in, 1/4 in Construction: * Balanced, double-flute construction requires less pressure, does the work for you