This Master Force 11-piece set of drill bits is a must-have for any DIY or professional project. The Torsion Zone 236-9201 model is made of durable steel and suitable for use with commercial, air drill, residential, air compressor, and drill tools. The set includes a variety of drill bits to fit all your drilling needs. With a brand reputation for quality and a package quantity of 1, this set is a great addition to your tool collection. These drill bits are sure to last and get the job done efficiently. Whether you're a home improvement enthusiast or a professional contractor, this Master Force set is a reliable choice for all your drilling needs.