The Cobalt Drill Bit Set is a versatile collection of 25 high-quality bits. From 1.0mm to 13mm in diameter with a precision of 0.5mm, these bits are perfect for tackling a wide range of projects. Made from durable cobalt steel, they excel at drilling through tough materials like stainless steel and cast iron. With their precision-ground point and spiral flute design, drilling is smooth and efficient, while the gold oxide finish enhances their longevity. The organized storage case keeps the bits secure and easily accessible.