QualTech 9/16" HSS 1/2" Reduced Shank Drill Bit DWDRSD9/16 The QualTech 9/16" HSS 1/2" Reduced Shank Drill Bit DWDRSD9/16 is a high-quality drill bit designed for precision drilling. With a 9/16" diameter and 1/2" reduced shank, this drill bit is perfect for a variety of drilling applications. The QualTech brand ensures reliability and durability, making it a trusted choice for professionals and DIY enthusiasts alike.