Titanium-coated, 1/4″ hex shank pilot drill bits for drilling pilot holes without undoing the chuck. Fits 1/4″ hex shank, fits all standard bit holders. Not suitable for high torque applications. Sizes: 3.0, 4.0, 4.5, 5.0, 5.5, 6.0 and 6.5mm. Titanium-coated, 1/4″ hex shank pilot drill bits for drilling pilot holes without undoing the chuck. Fits 1/4″ hex shank, fits all standard bit holders. Not suitable for high torque applications. Sizes: 3.0, 4.0, 4.5, 5.0, 5.5, 6.0 and 6.5mm.