General description Titanium-coated, 1/4" hex shank pilot drill bits designed for drilling pilot holes without the need to undo the chuck. This set includes a range of sizes suitable for various drilling tasks. Technical specifications Sizes: 3.0mm, 4.0mm, 4.5mm, 5.0mm, 5.5mm, 6.0mm, 6.5mm Shank type: 1/4" hex shank Compatibility and accessories Fits all standard bit holders Usage Not suitable for high torque applications