Tools, namely tools for machine tools, namely drilling tools of high-speed steel, carbide, ceramic cutting materials, cubic boron nitride, polycrystalline diamond (all coated or uncoated); drilling tools with interchangeable cutting tips, drilling tools with brazed or adhesively bonded cutting tips or cutting tips firmly connected in another way, drilling tools with interchangeable drilling bits, drilling tools with interchangeable pilot, centre or guide drills, drilling tools of modular construction, drilling tools with modular connection on the machine side (as interface and as separating point), extensions, namely extension adapters, intermediate adapters and parts of the aforesaid goods; interchangeable and firmly connected cutting tips of high-speed steel, carbide, ceramic cutting materials, cubic boron nitride, polycrystalline diamond (all coated or uncoated) for drilling tools, pilot, centre and guide drills for drilling tools, supporting and guide, setting and clamping elements for drilling tools; all the aforesaid goods as machine parts