Hole Saw TCT for metal in size 20mm. The blades are made of carbide, characterized by significantly greater hardness and resistance to high temperatures compared to high-speed steel HSS. Designed for drilling larger diameter holes in steel, cast iron, non-ferrous metals, wood, plastics, etc. To enhance cutting precision, a guiding drill made of HSS steel has been applied. A spring mounted on the guiding drill allows easy removal of debris. Product Characteristics: High-quality construction, translating into great precision of work Blades made of carbide, with a lifespan even 10 times longer compared to standard bimetal hole saws Carbide teeth can be re-sharpened Guiding drill made of HSS steel coated with a titanium layer Spring on the guiding drill designed for debris removal Hole saw has a collar protecting against over-drilling Solid construction reduces vibrations, significantly increasing drilling precision Replaceable guiding drill and spring To extend the hole saw's lifespan, it is recommended to use cooling lubricant Safe 3-sided phased handle prevents the hole saw from slipping in the drill chuck Technical Specification: Materials: tool steel, carbide, HSS steel Drilling diameter: 20 mm Maximum drilling depth: 25 mm Maximum revolutions per minute: 1000 RPM