CPC Subgroup
B21K 5/04 twisting-tools, e.g. drills, reamers
Full Title
Making tools or tool parts, e.g. pliers > drilling-tools or other for making or working on holes > twisting-tools, e.g. drills, reamers
B21K 5/04 Making tools or tool parts, e.g. pliers > drilling-tools or other for making or working on holes > twisting-tools, e.g. drills, reamers