Yato YT-3380 Electrician's Hole Saw Kit is a set of professional bi-metal hole saws for drilling large holes in metals, sheets, profiles and pipes. Also perfect for drilling in plastics, furniture boards, structural sandwich panels and resins. Recommended for professional use in industry, services and workshops. This set, due to the selection of elements, is especially dedicated to the electrical installation industry. Hole saws are made of the highest quality materials - teeth made of HSS M3 high-speed steel. The progressive tooth profile enhances aggressive cutting. The set includes a variable tooth pitch 4-6 TPI (TPI - number of teeth per 1 inch, i.e. 25.4mm), which greatly increases the efficiency of work. Includes hole saw: 22, 29, 35, 44, 67, 73 mm. Two handles for hole saws. Case.