Set of 6 TCT holesaws for metal in sizes 22-65mm. The blades are made of cemented carbides, which are characterized by much greater hardness and resistance to high temperatures compared to high-speed HSS steel. Designed to make larger diameter holes in steel, cast iron, non-ferrous metals, wood, plastics, etc. a HSS pilot drill used to increase the precision of cutting. The spring mounted on the guide drill allows you to easily remove the spoil. Product features: high quality for maximum precision of cutting carbide-tipped blades - 10 times longer service life compared to standard bi-metal holesaws carbide teeth can be re-sharpened HSS pilot drill bit with a titanium layer a spring on the guide drill designed to remove the spoil holesaws have a collar to prevent drilling solid construction reduces vibrations, and thus significantly increases the precision of drilling replaceable pilot drill and spring the use of cooling lubricant is recommended to extend the service life of the holesaws safe handle, chamfered on 3 sides, prevents slipping of the hole saw in the drill chuck the whole set is packed in a handy aluminum suitcase Technical Specifications: Material: tool steel, tungsten carbide, HSS steel Number of holesaws in the set: 6 Drilling diameters: 22, 30, 35, 45, 50, 65 mm Maximum drilling depth: 25 mm