The HART 5-Piece Assorted Titanium Countersink Bit Set includes a variety of drill bits designed for precision countersinking in woodworking and other projects. Manufactured by HART, the set includes bits with a manufacturer part number of HADW4. These high-quality drill bits are perfect for creating smooth and professional-looking finishes in a variety of materials. Perfect for DIY enthusiasts and professionals alike, this set provides versatile and durable tools for a range of drilling needs.