The Ideal 36-314 6 Pieces TKO Master Electrician's Carbide Teeth Hole Cutter Kit is a high-quality drill bit set designed for cutting through metal with precision. This kit includes 6 pieces, perfect for various drilling applications. Manufactured by Ideal, a trusted brand in the industry, this drill bit set is suitable for use with a drill, making it a convenient and versatile tool for any workshop or job site. Surface rust can be cleaned.